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1da177e4 LT |
1 | /* |
2 | ** System Bus Adapter (SBA) I/O MMU manager | |
3 | ** | |
4 | ** (c) Copyright 2000-2004 Grant Grundler <grundler @ parisc-linux x org> | |
5 | ** (c) Copyright 2004 Naresh Kumar Inna <knaresh at india x hp x com> | |
6 | ** (c) Copyright 2000-2004 Hewlett-Packard Company | |
7 | ** | |
8 | ** Portions (c) 1999 Dave S. Miller (from sparc64 I/O MMU code) | |
9 | ** | |
10 | ** This program is free software; you can redistribute it and/or modify | |
11 | ** it under the terms of the GNU General Public License as published by | |
12 | ** the Free Software Foundation; either version 2 of the License, or | |
13 | ** (at your option) any later version. | |
14 | ** | |
15 | ** | |
16 | ** This module initializes the IOC (I/O Controller) found on B1000/C3000/ | |
17 | ** J5000/J7000/N-class/L-class machines and their successors. | |
18 | ** | |
19 | ** FIXME: add DMA hint support programming in both sba and lba modules. | |
20 | */ | |
21 | ||
22 | #include <linux/config.h> | |
23 | #include <linux/types.h> | |
24 | #include <linux/kernel.h> | |
25 | #include <linux/spinlock.h> | |
26 | #include <linux/slab.h> | |
27 | #include <linux/init.h> | |
28 | ||
29 | #include <linux/mm.h> | |
30 | #include <linux/string.h> | |
31 | #include <linux/pci.h> | |
32 | ||
33 | #include <asm/byteorder.h> | |
34 | #include <asm/io.h> | |
35 | #include <asm/dma.h> /* for DMA_CHUNK_SIZE */ | |
36 | ||
37 | #include <asm/hardware.h> /* for register_parisc_driver() stuff */ | |
38 | ||
39 | #include <linux/proc_fs.h> | |
7ec14e49 KM |
40 | #include <linux/seq_file.h> |
41 | ||
1da177e4 LT |
42 | #include <asm/runway.h> /* for proc_runway_root */ |
43 | #include <asm/pdc.h> /* for PDC_MODEL_* */ | |
44 | #include <asm/pdcpat.h> /* for is_pdc_pat() */ | |
45 | #include <asm/parisc-device.h> | |
46 | ||
47 | ||
48 | /* declared in arch/parisc/kernel/setup.c */ | |
49 | extern struct proc_dir_entry * proc_mckinley_root; | |
50 | ||
51 | #define MODULE_NAME "SBA" | |
52 | ||
53 | #ifdef CONFIG_PROC_FS | |
54 | /* depends on proc fs support. But costs CPU performance */ | |
55 | #undef SBA_COLLECT_STATS | |
56 | #endif | |
57 | ||
58 | /* | |
59 | ** The number of debug flags is a clue - this code is fragile. | |
60 | ** Don't even think about messing with it unless you have | |
61 | ** plenty of 710's to sacrifice to the computer gods. :^) | |
62 | */ | |
63 | #undef DEBUG_SBA_INIT | |
64 | #undef DEBUG_SBA_RUN | |
65 | #undef DEBUG_SBA_RUN_SG | |
66 | #undef DEBUG_SBA_RESOURCE | |
67 | #undef ASSERT_PDIR_SANITY | |
68 | #undef DEBUG_LARGE_SG_ENTRIES | |
69 | #undef DEBUG_DMB_TRAP | |
70 | ||
71 | #ifdef DEBUG_SBA_INIT | |
72 | #define DBG_INIT(x...) printk(x) | |
73 | #else | |
74 | #define DBG_INIT(x...) | |
75 | #endif | |
76 | ||
77 | #ifdef DEBUG_SBA_RUN | |
78 | #define DBG_RUN(x...) printk(x) | |
79 | #else | |
80 | #define DBG_RUN(x...) | |
81 | #endif | |
82 | ||
83 | #ifdef DEBUG_SBA_RUN_SG | |
84 | #define DBG_RUN_SG(x...) printk(x) | |
85 | #else | |
86 | #define DBG_RUN_SG(x...) | |
87 | #endif | |
88 | ||
89 | ||
90 | #ifdef DEBUG_SBA_RESOURCE | |
91 | #define DBG_RES(x...) printk(x) | |
92 | #else | |
93 | #define DBG_RES(x...) | |
94 | #endif | |
95 | ||
64908ad9 GG |
96 | #if defined(CONFIG_64BIT) |
97 | /* "low end" PA8800 machines use ZX1 chipset: PAT PDC and only run 64-bit */ | |
1da177e4 LT |
98 | #define ZX1_SUPPORT |
99 | #endif | |
100 | ||
101 | #define SBA_INLINE __inline__ | |
102 | ||
103 | ||
104 | /* | |
105 | ** The number of pdir entries to "free" before issueing | |
106 | ** a read to PCOM register to flush out PCOM writes. | |
107 | ** Interacts with allocation granularity (ie 4 or 8 entries | |
108 | ** allocated and free'd/purged at a time might make this | |
109 | ** less interesting). | |
110 | */ | |
111 | #define DELAYED_RESOURCE_CNT 16 | |
112 | ||
113 | #define DEFAULT_DMA_HINT_REG 0 | |
114 | ||
115 | #define ASTRO_RUNWAY_PORT 0x582 | |
116 | #define IKE_MERCED_PORT 0x803 | |
117 | #define REO_MERCED_PORT 0x804 | |
118 | #define REOG_MERCED_PORT 0x805 | |
119 | #define PLUTO_MCKINLEY_PORT 0x880 | |
120 | ||
121 | #define SBA_FUNC_ID 0x0000 /* function id */ | |
122 | #define SBA_FCLASS 0x0008 /* function class, bist, header, rev... */ | |
123 | ||
124 | #define IS_ASTRO(id) ((id)->hversion == ASTRO_RUNWAY_PORT) | |
125 | #define IS_IKE(id) ((id)->hversion == IKE_MERCED_PORT) | |
126 | #define IS_PLUTO(id) ((id)->hversion == PLUTO_MCKINLEY_PORT) | |
127 | ||
128 | #define SBA_FUNC_SIZE 4096 /* SBA configuration function reg set */ | |
129 | ||
130 | #define ASTRO_IOC_OFFSET (32 * SBA_FUNC_SIZE) | |
131 | #define PLUTO_IOC_OFFSET (1 * SBA_FUNC_SIZE) | |
132 | /* Ike's IOC's occupy functions 2 and 3 */ | |
133 | #define IKE_IOC_OFFSET(p) ((p+2) * SBA_FUNC_SIZE) | |
134 | ||
135 | #define IOC_CTRL 0x8 /* IOC_CTRL offset */ | |
136 | #define IOC_CTRL_TC (1 << 0) /* TOC Enable */ | |
137 | #define IOC_CTRL_CE (1 << 1) /* Coalesce Enable */ | |
138 | #define IOC_CTRL_DE (1 << 2) /* Dillon Enable */ | |
139 | #define IOC_CTRL_RM (1 << 8) /* Real Mode */ | |
140 | #define IOC_CTRL_NC (1 << 9) /* Non Coherent Mode */ | |
141 | #define IOC_CTRL_D4 (1 << 11) /* Disable 4-byte coalescing */ | |
142 | #define IOC_CTRL_DD (1 << 13) /* Disable distr. LMMIO range coalescing */ | |
143 | ||
144 | #define MAX_IOC 2 /* per Ike. Pluto/Astro only have 1. */ | |
145 | ||
146 | #define ROPES_PER_IOC 8 /* per Ike half or Pluto/Astro */ | |
147 | ||
148 | ||
149 | /* | |
150 | ** Offsets into MBIB (Function 0 on Ike and hopefully Astro) | |
151 | ** Firmware programs this stuff. Don't touch it. | |
152 | */ | |
153 | #define LMMIO_DIRECT0_BASE 0x300 | |
154 | #define LMMIO_DIRECT0_MASK 0x308 | |
155 | #define LMMIO_DIRECT0_ROUTE 0x310 | |
156 | ||
157 | #define LMMIO_DIST_BASE 0x360 | |
158 | #define LMMIO_DIST_MASK 0x368 | |
159 | #define LMMIO_DIST_ROUTE 0x370 | |
160 | ||
161 | #define IOS_DIST_BASE 0x390 | |
162 | #define IOS_DIST_MASK 0x398 | |
163 | #define IOS_DIST_ROUTE 0x3A0 | |
164 | ||
165 | #define IOS_DIRECT_BASE 0x3C0 | |
166 | #define IOS_DIRECT_MASK 0x3C8 | |
167 | #define IOS_DIRECT_ROUTE 0x3D0 | |
168 | ||
169 | /* | |
170 | ** Offsets into I/O TLB (Function 2 and 3 on Ike) | |
171 | */ | |
172 | #define ROPE0_CTL 0x200 /* "regbus pci0" */ | |
173 | #define ROPE1_CTL 0x208 | |
174 | #define ROPE2_CTL 0x210 | |
175 | #define ROPE3_CTL 0x218 | |
176 | #define ROPE4_CTL 0x220 | |
177 | #define ROPE5_CTL 0x228 | |
178 | #define ROPE6_CTL 0x230 | |
179 | #define ROPE7_CTL 0x238 | |
180 | ||
181 | #define HF_ENABLE 0x40 | |
182 | ||
183 | ||
184 | #define IOC_IBASE 0x300 /* IO TLB */ | |
185 | #define IOC_IMASK 0x308 | |
186 | #define IOC_PCOM 0x310 | |
187 | #define IOC_TCNFG 0x318 | |
188 | #define IOC_PDIR_BASE 0x320 | |
189 | ||
190 | /* AGP GART driver looks for this */ | |
191 | #define SBA_IOMMU_COOKIE 0x0000badbadc0ffeeUL | |
192 | ||
193 | ||
194 | /* | |
195 | ** IOC supports 4/8/16/64KB page sizes (see TCNFG register) | |
196 | ** It's safer (avoid memory corruption) to keep DMA page mappings | |
197 | ** equivalently sized to VM PAGE_SIZE. | |
198 | ** | |
199 | ** We really can't avoid generating a new mapping for each | |
200 | ** page since the Virtual Coherence Index has to be generated | |
201 | ** and updated for each page. | |
202 | ** | |
203 | ** PAGE_SIZE could be greater than IOVP_SIZE. But not the inverse. | |
204 | */ | |
205 | #define IOVP_SIZE PAGE_SIZE | |
206 | #define IOVP_SHIFT PAGE_SHIFT | |
207 | #define IOVP_MASK PAGE_MASK | |
208 | ||
209 | #define SBA_PERF_CFG 0x708 /* Performance Counter stuff */ | |
210 | #define SBA_PERF_MASK1 0x718 | |
211 | #define SBA_PERF_MASK2 0x730 | |
212 | ||
213 | ||
214 | /* | |
215 | ** Offsets into PCI Performance Counters (functions 12 and 13) | |
216 | ** Controlled by PERF registers in function 2 & 3 respectively. | |
217 | */ | |
218 | #define SBA_PERF_CNT1 0x200 | |
219 | #define SBA_PERF_CNT2 0x208 | |
220 | #define SBA_PERF_CNT3 0x210 | |
221 | ||
222 | ||
223 | struct ioc { | |
224 | void __iomem *ioc_hpa; /* I/O MMU base address */ | |
225 | char *res_map; /* resource map, bit == pdir entry */ | |
226 | u64 *pdir_base; /* physical base address */ | |
227 | unsigned long ibase; /* pdir IOV Space base - shared w/lba_pci */ | |
228 | unsigned long imask; /* pdir IOV Space mask - shared w/lba_pci */ | |
229 | #ifdef ZX1_SUPPORT | |
230 | unsigned long iovp_mask; /* help convert IOVA to IOVP */ | |
231 | #endif | |
232 | unsigned long *res_hint; /* next avail IOVP - circular search */ | |
233 | spinlock_t res_lock; | |
234 | unsigned int res_bitshift; /* from the LEFT! */ | |
235 | unsigned int res_size; /* size of resource map in bytes */ | |
64908ad9 | 236 | #ifdef SBA_HINT_SUPPORT |
1da177e4 LT |
237 | /* FIXME : DMA HINTs not used */ |
238 | unsigned long hint_mask_pdir; /* bits used for DMA hints */ | |
239 | unsigned int hint_shift_pdir; | |
240 | #endif | |
241 | #if DELAYED_RESOURCE_CNT > 0 | |
242 | int saved_cnt; | |
243 | struct sba_dma_pair { | |
244 | dma_addr_t iova; | |
245 | size_t size; | |
246 | } saved[DELAYED_RESOURCE_CNT]; | |
247 | #endif | |
248 | ||
249 | #ifdef SBA_COLLECT_STATS | |
250 | #define SBA_SEARCH_SAMPLE 0x100 | |
251 | unsigned long avg_search[SBA_SEARCH_SAMPLE]; | |
252 | unsigned long avg_idx; /* current index into avg_search */ | |
253 | unsigned long used_pages; | |
254 | unsigned long msingle_calls; | |
255 | unsigned long msingle_pages; | |
256 | unsigned long msg_calls; | |
257 | unsigned long msg_pages; | |
258 | unsigned long usingle_calls; | |
259 | unsigned long usingle_pages; | |
260 | unsigned long usg_calls; | |
261 | unsigned long usg_pages; | |
262 | #endif | |
263 | ||
264 | /* STUFF We don't need in performance path */ | |
265 | unsigned int pdir_size; /* in bytes, determined by IOV Space size */ | |
266 | }; | |
267 | ||
268 | struct sba_device { | |
269 | struct sba_device *next; /* list of SBA's in system */ | |
270 | struct parisc_device *dev; /* dev found in bus walk */ | |
271 | struct parisc_device_id *iodc; /* data about dev from firmware */ | |
272 | const char *name; | |
273 | void __iomem *sba_hpa; /* base address */ | |
274 | spinlock_t sba_lock; | |
275 | unsigned int flags; /* state/functionality enabled */ | |
276 | unsigned int hw_rev; /* HW revision of chip */ | |
277 | ||
278 | struct resource chip_resv; /* MMIO reserved for chip */ | |
279 | struct resource iommu_resv; /* MMIO reserved for iommu */ | |
280 | ||
281 | unsigned int num_ioc; /* number of on-board IOC's */ | |
282 | struct ioc ioc[MAX_IOC]; | |
283 | }; | |
284 | ||
285 | ||
286 | static struct sba_device *sba_list; | |
287 | ||
288 | static unsigned long ioc_needs_fdc = 0; | |
289 | ||
290 | /* global count of IOMMUs in the system */ | |
291 | static unsigned int global_ioc_cnt = 0; | |
292 | ||
293 | /* PA8700 (Piranha 2.2) bug workaround */ | |
294 | static unsigned long piranha_bad_128k = 0; | |
295 | ||
296 | /* Looks nice and keeps the compiler happy */ | |
297 | #define SBA_DEV(d) ((struct sba_device *) (d)) | |
298 | ||
64908ad9 | 299 | #ifdef SBA_AGP_SUPPORT |
1da177e4 LT |
300 | static int reserve_sba_gart = 1; |
301 | #endif | |
302 | ||
303 | #define ROUNDUP(x,y) ((x + ((y)-1)) & ~((y)-1)) | |
304 | ||
305 | ||
306 | /************************************ | |
307 | ** SBA register read and write support | |
308 | ** | |
309 | ** BE WARNED: register writes are posted. | |
310 | ** (ie follow writes which must reach HW with a read) | |
311 | ** | |
312 | ** Superdome (in particular, REO) allows only 64-bit CSR accesses. | |
313 | */ | |
314 | #define READ_REG32(addr) le32_to_cpu(__raw_readl(addr)) | |
315 | #define READ_REG64(addr) le64_to_cpu(__raw_readq(addr)) | |
316 | #define WRITE_REG32(val, addr) __raw_writel(cpu_to_le32(val), addr) | |
317 | #define WRITE_REG64(val, addr) __raw_writeq(cpu_to_le64(val), addr) | |
318 | ||
64908ad9 | 319 | #ifdef CONFIG_64BIT |
1da177e4 LT |
320 | #define READ_REG(addr) READ_REG64(addr) |
321 | #define WRITE_REG(value, addr) WRITE_REG64(value, addr) | |
322 | #else | |
323 | #define READ_REG(addr) READ_REG32(addr) | |
324 | #define WRITE_REG(value, addr) WRITE_REG32(value, addr) | |
325 | #endif | |
326 | ||
327 | #ifdef DEBUG_SBA_INIT | |
328 | ||
64908ad9 | 329 | /* NOTE: When CONFIG_64BIT isn't defined, READ_REG64() is two 32-bit reads */ |
1da177e4 LT |
330 | |
331 | /** | |
332 | * sba_dump_ranges - debugging only - print ranges assigned to this IOA | |
333 | * @hpa: base address of the sba | |
334 | * | |
335 | * Print the MMIO and IO Port address ranges forwarded by an Astro/Ike/RIO | |
336 | * IO Adapter (aka Bus Converter). | |
337 | */ | |
338 | static void | |
339 | sba_dump_ranges(void __iomem *hpa) | |
340 | { | |
341 | DBG_INIT("SBA at 0x%p\n", hpa); | |
342 | DBG_INIT("IOS_DIST_BASE : %Lx\n", READ_REG64(hpa+IOS_DIST_BASE)); | |
343 | DBG_INIT("IOS_DIST_MASK : %Lx\n", READ_REG64(hpa+IOS_DIST_MASK)); | |
344 | DBG_INIT("IOS_DIST_ROUTE : %Lx\n", READ_REG64(hpa+IOS_DIST_ROUTE)); | |
345 | DBG_INIT("\n"); | |
346 | DBG_INIT("IOS_DIRECT_BASE : %Lx\n", READ_REG64(hpa+IOS_DIRECT_BASE)); | |
347 | DBG_INIT("IOS_DIRECT_MASK : %Lx\n", READ_REG64(hpa+IOS_DIRECT_MASK)); | |
348 | DBG_INIT("IOS_DIRECT_ROUTE: %Lx\n", READ_REG64(hpa+IOS_DIRECT_ROUTE)); | |
349 | } | |
350 | ||
351 | /** | |
352 | * sba_dump_tlb - debugging only - print IOMMU operating parameters | |
353 | * @hpa: base address of the IOMMU | |
354 | * | |
355 | * Print the size/location of the IO MMU PDIR. | |
356 | */ | |
357 | static void sba_dump_tlb(void __iomem *hpa) | |
358 | { | |
359 | DBG_INIT("IO TLB at 0x%p\n", hpa); | |
360 | DBG_INIT("IOC_IBASE : 0x%Lx\n", READ_REG64(hpa+IOC_IBASE)); | |
361 | DBG_INIT("IOC_IMASK : 0x%Lx\n", READ_REG64(hpa+IOC_IMASK)); | |
362 | DBG_INIT("IOC_TCNFG : 0x%Lx\n", READ_REG64(hpa+IOC_TCNFG)); | |
363 | DBG_INIT("IOC_PDIR_BASE: 0x%Lx\n", READ_REG64(hpa+IOC_PDIR_BASE)); | |
364 | DBG_INIT("\n"); | |
365 | } | |
366 | #else | |
367 | #define sba_dump_ranges(x) | |
368 | #define sba_dump_tlb(x) | |
64908ad9 | 369 | #endif /* DEBUG_SBA_INIT */ |
1da177e4 LT |
370 | |
371 | ||
372 | #ifdef ASSERT_PDIR_SANITY | |
373 | ||
374 | /** | |
375 | * sba_dump_pdir_entry - debugging only - print one IOMMU PDIR entry | |
376 | * @ioc: IO MMU structure which owns the pdir we are interested in. | |
377 | * @msg: text to print ont the output line. | |
378 | * @pide: pdir index. | |
379 | * | |
380 | * Print one entry of the IO MMU PDIR in human readable form. | |
381 | */ | |
382 | static void | |
383 | sba_dump_pdir_entry(struct ioc *ioc, char *msg, uint pide) | |
384 | { | |
385 | /* start printing from lowest pde in rval */ | |
386 | u64 *ptr = &(ioc->pdir_base[pide & (~0U * BITS_PER_LONG)]); | |
387 | unsigned long *rptr = (unsigned long *) &(ioc->res_map[(pide >>3) & ~(sizeof(unsigned long) - 1)]); | |
388 | uint rcnt; | |
389 | ||
390 | printk(KERN_DEBUG "SBA: %s rp %p bit %d rval 0x%lx\n", | |
391 | msg, | |
392 | rptr, pide & (BITS_PER_LONG - 1), *rptr); | |
393 | ||
394 | rcnt = 0; | |
395 | while (rcnt < BITS_PER_LONG) { | |
396 | printk(KERN_DEBUG "%s %2d %p %016Lx\n", | |
397 | (rcnt == (pide & (BITS_PER_LONG - 1))) | |
398 | ? " -->" : " ", | |
399 | rcnt, ptr, *ptr ); | |
400 | rcnt++; | |
401 | ptr++; | |
402 | } | |
403 | printk(KERN_DEBUG "%s", msg); | |
404 | } | |
405 | ||
406 | ||
407 | /** | |
408 | * sba_check_pdir - debugging only - consistency checker | |
409 | * @ioc: IO MMU structure which owns the pdir we are interested in. | |
410 | * @msg: text to print ont the output line. | |
411 | * | |
412 | * Verify the resource map and pdir state is consistent | |
413 | */ | |
414 | static int | |
415 | sba_check_pdir(struct ioc *ioc, char *msg) | |
416 | { | |
417 | u32 *rptr_end = (u32 *) &(ioc->res_map[ioc->res_size]); | |
418 | u32 *rptr = (u32 *) ioc->res_map; /* resource map ptr */ | |
419 | u64 *pptr = ioc->pdir_base; /* pdir ptr */ | |
420 | uint pide = 0; | |
421 | ||
422 | while (rptr < rptr_end) { | |
423 | u32 rval = *rptr; | |
424 | int rcnt = 32; /* number of bits we might check */ | |
425 | ||
426 | while (rcnt) { | |
427 | /* Get last byte and highest bit from that */ | |
428 | u32 pde = ((u32) (((char *)pptr)[7])) << 24; | |
429 | if ((rval ^ pde) & 0x80000000) | |
430 | { | |
431 | /* | |
432 | ** BUMMER! -- res_map != pdir -- | |
433 | ** Dump rval and matching pdir entries | |
434 | */ | |
435 | sba_dump_pdir_entry(ioc, msg, pide); | |
436 | return(1); | |
437 | } | |
438 | rcnt--; | |
439 | rval <<= 1; /* try the next bit */ | |
440 | pptr++; | |
441 | pide++; | |
442 | } | |
443 | rptr++; /* look at next word of res_map */ | |
444 | } | |
445 | /* It'd be nice if we always got here :^) */ | |
446 | return 0; | |
447 | } | |
448 | ||
449 | ||
450 | /** | |
451 | * sba_dump_sg - debugging only - print Scatter-Gather list | |
452 | * @ioc: IO MMU structure which owns the pdir we are interested in. | |
453 | * @startsg: head of the SG list | |
454 | * @nents: number of entries in SG list | |
455 | * | |
456 | * print the SG list so we can verify it's correct by hand. | |
457 | */ | |
458 | static void | |
459 | sba_dump_sg( struct ioc *ioc, struct scatterlist *startsg, int nents) | |
460 | { | |
461 | while (nents-- > 0) { | |
462 | printk(KERN_DEBUG " %d : %08lx/%05x %p/%05x\n", | |
463 | nents, | |
464 | (unsigned long) sg_dma_address(startsg), | |
465 | sg_dma_len(startsg), | |
466 | sg_virt_addr(startsg), startsg->length); | |
467 | startsg++; | |
468 | } | |
469 | } | |
470 | ||
471 | #endif /* ASSERT_PDIR_SANITY */ | |
472 | ||
473 | ||
474 | ||
475 | ||
476 | /************************************************************** | |
477 | * | |
478 | * I/O Pdir Resource Management | |
479 | * | |
480 | * Bits set in the resource map are in use. | |
481 | * Each bit can represent a number of pages. | |
482 | * LSbs represent lower addresses (IOVA's). | |
483 | * | |
484 | ***************************************************************/ | |
485 | #define PAGES_PER_RANGE 1 /* could increase this to 4 or 8 if needed */ | |
486 | ||
487 | /* Convert from IOVP to IOVA and vice versa. */ | |
488 | ||
489 | #ifdef ZX1_SUPPORT | |
490 | /* Pluto (aka ZX1) boxes need to set or clear the ibase bits appropriately */ | |
491 | #define SBA_IOVA(ioc,iovp,offset,hint_reg) ((ioc->ibase) | (iovp) | (offset)) | |
492 | #define SBA_IOVP(ioc,iova) ((iova) & (ioc)->iovp_mask) | |
493 | #else | |
494 | /* only support Astro and ancestors. Saves a few cycles in key places */ | |
495 | #define SBA_IOVA(ioc,iovp,offset,hint_reg) ((iovp) | (offset)) | |
496 | #define SBA_IOVP(ioc,iova) (iova) | |
497 | #endif | |
498 | ||
499 | #define PDIR_INDEX(iovp) ((iovp)>>IOVP_SHIFT) | |
500 | ||
501 | #define RESMAP_MASK(n) (~0UL << (BITS_PER_LONG - (n))) | |
502 | #define RESMAP_IDX_MASK (sizeof(unsigned long) - 1) | |
503 | ||
504 | ||
505 | /** | |
506 | * sba_search_bitmap - find free space in IO PDIR resource bitmap | |
507 | * @ioc: IO MMU structure which owns the pdir we are interested in. | |
508 | * @bits_wanted: number of entries we need. | |
509 | * | |
510 | * Find consecutive free bits in resource bitmap. | |
511 | * Each bit represents one entry in the IO Pdir. | |
512 | * Cool perf optimization: search for log2(size) bits at a time. | |
513 | */ | |
514 | static SBA_INLINE unsigned long | |
515 | sba_search_bitmap(struct ioc *ioc, unsigned long bits_wanted) | |
516 | { | |
517 | unsigned long *res_ptr = ioc->res_hint; | |
518 | unsigned long *res_end = (unsigned long *) &(ioc->res_map[ioc->res_size]); | |
519 | unsigned long pide = ~0UL; | |
520 | ||
521 | if (bits_wanted > (BITS_PER_LONG/2)) { | |
522 | /* Search word at a time - no mask needed */ | |
523 | for(; res_ptr < res_end; ++res_ptr) { | |
524 | if (*res_ptr == 0) { | |
525 | *res_ptr = RESMAP_MASK(bits_wanted); | |
526 | pide = ((unsigned long)res_ptr - (unsigned long)ioc->res_map); | |
527 | pide <<= 3; /* convert to bit address */ | |
528 | break; | |
529 | } | |
530 | } | |
531 | /* point to the next word on next pass */ | |
532 | res_ptr++; | |
533 | ioc->res_bitshift = 0; | |
534 | } else { | |
535 | /* | |
536 | ** Search the resource bit map on well-aligned values. | |
537 | ** "o" is the alignment. | |
538 | ** We need the alignment to invalidate I/O TLB using | |
539 | ** SBA HW features in the unmap path. | |
540 | */ | |
541 | unsigned long o = 1 << get_order(bits_wanted << PAGE_SHIFT); | |
542 | uint bitshiftcnt = ROUNDUP(ioc->res_bitshift, o); | |
543 | unsigned long mask; | |
544 | ||
545 | if (bitshiftcnt >= BITS_PER_LONG) { | |
546 | bitshiftcnt = 0; | |
547 | res_ptr++; | |
548 | } | |
549 | mask = RESMAP_MASK(bits_wanted) >> bitshiftcnt; | |
550 | ||
551 | DBG_RES("%s() o %ld %p", __FUNCTION__, o, res_ptr); | |
552 | while(res_ptr < res_end) | |
553 | { | |
554 | DBG_RES(" %p %lx %lx\n", res_ptr, mask, *res_ptr); | |
555 | WARN_ON(mask == 0); | |
556 | if(((*res_ptr) & mask) == 0) { | |
557 | *res_ptr |= mask; /* mark resources busy! */ | |
558 | pide = ((unsigned long)res_ptr - (unsigned long)ioc->res_map); | |
559 | pide <<= 3; /* convert to bit address */ | |
560 | pide += bitshiftcnt; | |
561 | break; | |
562 | } | |
563 | mask >>= o; | |
564 | bitshiftcnt += o; | |
565 | if (mask == 0) { | |
566 | mask = RESMAP_MASK(bits_wanted); | |
567 | bitshiftcnt=0; | |
568 | res_ptr++; | |
569 | } | |
570 | } | |
571 | /* look in the same word on the next pass */ | |
572 | ioc->res_bitshift = bitshiftcnt + bits_wanted; | |
573 | } | |
574 | ||
575 | /* wrapped ? */ | |
576 | if (res_end <= res_ptr) { | |
577 | ioc->res_hint = (unsigned long *) ioc->res_map; | |
578 | ioc->res_bitshift = 0; | |
579 | } else { | |
580 | ioc->res_hint = res_ptr; | |
581 | } | |
582 | return (pide); | |
583 | } | |
584 | ||
585 | ||
586 | /** | |
587 | * sba_alloc_range - find free bits and mark them in IO PDIR resource bitmap | |
588 | * @ioc: IO MMU structure which owns the pdir we are interested in. | |
589 | * @size: number of bytes to create a mapping for | |
590 | * | |
591 | * Given a size, find consecutive unmarked and then mark those bits in the | |
592 | * resource bit map. | |
593 | */ | |
594 | static int | |
595 | sba_alloc_range(struct ioc *ioc, size_t size) | |
596 | { | |
597 | unsigned int pages_needed = size >> IOVP_SHIFT; | |
598 | #ifdef SBA_COLLECT_STATS | |
599 | unsigned long cr_start = mfctl(16); | |
600 | #endif | |
601 | unsigned long pide; | |
602 | ||
603 | pide = sba_search_bitmap(ioc, pages_needed); | |
604 | if (pide >= (ioc->res_size << 3)) { | |
605 | pide = sba_search_bitmap(ioc, pages_needed); | |
606 | if (pide >= (ioc->res_size << 3)) | |
607 | panic("%s: I/O MMU @ %p is out of mapping resources\n", | |
608 | __FILE__, ioc->ioc_hpa); | |
609 | } | |
610 | ||
611 | #ifdef ASSERT_PDIR_SANITY | |
612 | /* verify the first enable bit is clear */ | |
613 | if(0x00 != ((u8 *) ioc->pdir_base)[pide*sizeof(u64) + 7]) { | |
614 | sba_dump_pdir_entry(ioc, "sba_search_bitmap() botched it?", pide); | |
615 | } | |
616 | #endif | |
617 | ||
618 | DBG_RES("%s(%x) %d -> %lx hint %x/%x\n", | |
619 | __FUNCTION__, size, pages_needed, pide, | |
620 | (uint) ((unsigned long) ioc->res_hint - (unsigned long) ioc->res_map), | |
621 | ioc->res_bitshift ); | |
622 | ||
623 | #ifdef SBA_COLLECT_STATS | |
624 | { | |
625 | unsigned long cr_end = mfctl(16); | |
626 | unsigned long tmp = cr_end - cr_start; | |
627 | /* check for roll over */ | |
628 | cr_start = (cr_end < cr_start) ? -(tmp) : (tmp); | |
629 | } | |
630 | ioc->avg_search[ioc->avg_idx++] = cr_start; | |
631 | ioc->avg_idx &= SBA_SEARCH_SAMPLE - 1; | |
632 | ||
633 | ioc->used_pages += pages_needed; | |
634 | #endif | |
635 | ||
636 | return (pide); | |
637 | } | |
638 | ||
639 | ||
640 | /** | |
641 | * sba_free_range - unmark bits in IO PDIR resource bitmap | |
642 | * @ioc: IO MMU structure which owns the pdir we are interested in. | |
643 | * @iova: IO virtual address which was previously allocated. | |
644 | * @size: number of bytes to create a mapping for | |
645 | * | |
646 | * clear bits in the ioc's resource map | |
647 | */ | |
648 | static SBA_INLINE void | |
649 | sba_free_range(struct ioc *ioc, dma_addr_t iova, size_t size) | |
650 | { | |
651 | unsigned long iovp = SBA_IOVP(ioc, iova); | |
652 | unsigned int pide = PDIR_INDEX(iovp); | |
653 | unsigned int ridx = pide >> 3; /* convert bit to byte address */ | |
654 | unsigned long *res_ptr = (unsigned long *) &((ioc)->res_map[ridx & ~RESMAP_IDX_MASK]); | |
655 | ||
656 | int bits_not_wanted = size >> IOVP_SHIFT; | |
657 | ||
658 | /* 3-bits "bit" address plus 2 (or 3) bits for "byte" == bit in word */ | |
659 | unsigned long m = RESMAP_MASK(bits_not_wanted) >> (pide & (BITS_PER_LONG - 1)); | |
660 | ||
661 | DBG_RES("%s( ,%x,%x) %x/%lx %x %p %lx\n", | |
662 | __FUNCTION__, (uint) iova, size, | |
663 | bits_not_wanted, m, pide, res_ptr, *res_ptr); | |
664 | ||
665 | #ifdef SBA_COLLECT_STATS | |
666 | ioc->used_pages -= bits_not_wanted; | |
667 | #endif | |
668 | ||
669 | *res_ptr &= ~m; | |
670 | } | |
671 | ||
672 | ||
673 | /************************************************************** | |
674 | * | |
675 | * "Dynamic DMA Mapping" support (aka "Coherent I/O") | |
676 | * | |
677 | ***************************************************************/ | |
678 | ||
64908ad9 | 679 | #ifdef SBA_HINT_SUPPORT |
1da177e4 LT |
680 | #define SBA_DMA_HINT(ioc, val) ((val) << (ioc)->hint_shift_pdir) |
681 | #endif | |
682 | ||
683 | typedef unsigned long space_t; | |
684 | #define KERNEL_SPACE 0 | |
685 | ||
686 | /** | |
687 | * sba_io_pdir_entry - fill in one IO PDIR entry | |
688 | * @pdir_ptr: pointer to IO PDIR entry | |
689 | * @sid: process Space ID - currently only support KERNEL_SPACE | |
690 | * @vba: Virtual CPU address of buffer to map | |
691 | * @hint: DMA hint set to use for this mapping | |
692 | * | |
693 | * SBA Mapping Routine | |
694 | * | |
695 | * Given a virtual address (vba, arg2) and space id, (sid, arg1) | |
696 | * sba_io_pdir_entry() loads the I/O PDIR entry pointed to by | |
697 | * pdir_ptr (arg0). | |
698 | * Using the bass-ackwards HP bit numbering, Each IO Pdir entry | |
699 | * for Astro/Ike looks like: | |
700 | * | |
701 | * | |
702 | * 0 19 51 55 63 | |
703 | * +-+---------------------+----------------------------------+----+--------+ | |
704 | * |V| U | PPN[43:12] | U | VI | | |
705 | * +-+---------------------+----------------------------------+----+--------+ | |
706 | * | |
707 | * Pluto is basically identical, supports fewer physical address bits: | |
708 | * | |
709 | * 0 23 51 55 63 | |
710 | * +-+------------------------+-------------------------------+----+--------+ | |
711 | * |V| U | PPN[39:12] | U | VI | | |
712 | * +-+------------------------+-------------------------------+----+--------+ | |
713 | * | |
714 | * V == Valid Bit (Most Significant Bit is bit 0) | |
715 | * U == Unused | |
716 | * PPN == Physical Page Number | |
717 | * VI == Virtual Index (aka Coherent Index) | |
718 | * | |
719 | * LPA instruction output is put into PPN field. | |
720 | * LCI (Load Coherence Index) instruction provides the "VI" bits. | |
721 | * | |
722 | * We pre-swap the bytes since PCX-W is Big Endian and the | |
723 | * IOMMU uses little endian for the pdir. | |
724 | */ | |
725 | ||
726 | void SBA_INLINE | |
727 | sba_io_pdir_entry(u64 *pdir_ptr, space_t sid, unsigned long vba, | |
728 | unsigned long hint) | |
729 | { | |
730 | u64 pa; /* physical address */ | |
731 | register unsigned ci; /* coherent index */ | |
732 | ||
733 | pa = virt_to_phys(vba); | |
734 | pa &= IOVP_MASK; | |
735 | ||
736 | mtsp(sid,1); | |
737 | asm("lci 0(%%sr1, %1), %0" : "=r" (ci) : "r" (vba)); | |
738 | pa |= (ci >> 12) & 0xff; /* move CI (8 bits) into lowest byte */ | |
739 | ||
740 | pa |= 0x8000000000000000ULL; /* set "valid" bit */ | |
741 | *pdir_ptr = cpu_to_le64(pa); /* swap and store into I/O Pdir */ | |
742 | ||
743 | /* | |
744 | * If the PDC_MODEL capabilities has Non-coherent IO-PDIR bit set | |
745 | * (bit #61, big endian), we have to flush and sync every time | |
746 | * IO-PDIR is changed in Ike/Astro. | |
747 | */ | |
64908ad9 GG |
748 | if (ioc_needs_fdc) |
749 | asm volatile("fdc %%r0(%0)" : : "r" (pdir_ptr)); | |
1da177e4 LT |
750 | } |
751 | ||
752 | ||
753 | /** | |
754 | * sba_mark_invalid - invalidate one or more IO PDIR entries | |
755 | * @ioc: IO MMU structure which owns the pdir we are interested in. | |
756 | * @iova: IO Virtual Address mapped earlier | |
757 | * @byte_cnt: number of bytes this mapping covers. | |
758 | * | |
759 | * Marking the IO PDIR entry(ies) as Invalid and invalidate | |
760 | * corresponding IO TLB entry. The Ike PCOM (Purge Command Register) | |
761 | * is to purge stale entries in the IO TLB when unmapping entries. | |
762 | * | |
763 | * The PCOM register supports purging of multiple pages, with a minium | |
764 | * of 1 page and a maximum of 2GB. Hardware requires the address be | |
765 | * aligned to the size of the range being purged. The size of the range | |
766 | * must be a power of 2. The "Cool perf optimization" in the | |
767 | * allocation routine helps keep that true. | |
768 | */ | |
769 | static SBA_INLINE void | |
770 | sba_mark_invalid(struct ioc *ioc, dma_addr_t iova, size_t byte_cnt) | |
771 | { | |
772 | u32 iovp = (u32) SBA_IOVP(ioc,iova); | |
64908ad9 | 773 | u64 *pdir_ptr = &ioc->pdir_base[PDIR_INDEX(iovp)]; |
1da177e4 LT |
774 | |
775 | #ifdef ASSERT_PDIR_SANITY | |
64908ad9 GG |
776 | /* Assert first pdir entry is set. |
777 | ** | |
778 | ** Even though this is a big-endian machine, the entries | |
779 | ** in the iopdir are little endian. That's why we look at | |
780 | ** the byte at +7 instead of at +0. | |
781 | */ | |
782 | if (0x80 != (((u8 *) pdir_ptr)[7])) { | |
1da177e4 LT |
783 | sba_dump_pdir_entry(ioc,"sba_mark_invalid()", PDIR_INDEX(iovp)); |
784 | } | |
785 | #endif | |
786 | ||
64908ad9 | 787 | if (byte_cnt > IOVP_SIZE) |
1da177e4 | 788 | { |
64908ad9 GG |
789 | #if 0 |
790 | unsigned long entries_per_cacheline = ioc_needs_fdc ? | |
791 | L1_CACHE_ALIGN(((unsigned long) pdir_ptr)) | |
792 | - (unsigned long) pdir_ptr; | |
793 | : 262144; | |
794 | #endif | |
1da177e4 | 795 | |
64908ad9 GG |
796 | /* set "size" field for PCOM */ |
797 | iovp |= get_order(byte_cnt) + PAGE_SHIFT; | |
1da177e4 | 798 | |
1da177e4 LT |
799 | do { |
800 | /* clear I/O Pdir entry "valid" bit first */ | |
64908ad9 GG |
801 | ((u8 *) pdir_ptr)[7] = 0; |
802 | if (ioc_needs_fdc) { | |
803 | asm volatile("fdc %%r0(%0)" : : "r" (pdir_ptr)); | |
804 | #if 0 | |
805 | entries_per_cacheline = L1_CACHE_SHIFT - 3; | |
806 | #endif | |
807 | } | |
808 | pdir_ptr++; | |
1da177e4 | 809 | byte_cnt -= IOVP_SIZE; |
64908ad9 GG |
810 | } while (byte_cnt > IOVP_SIZE); |
811 | } else | |
812 | iovp |= IOVP_SHIFT; /* set "size" field for PCOM */ | |
813 | ||
814 | /* | |
815 | ** clear I/O PDIR entry "valid" bit. | |
816 | ** We have to R/M/W the cacheline regardless how much of the | |
817 | ** pdir entry that we clobber. | |
818 | ** The rest of the entry would be useful for debugging if we | |
819 | ** could dump core on HPMC. | |
820 | */ | |
821 | ((u8 *) pdir_ptr)[7] = 0; | |
822 | if (ioc_needs_fdc) | |
823 | asm volatile("fdc %%r0(%0)" : : "r" (pdir_ptr)); | |
1da177e4 LT |
824 | |
825 | WRITE_REG( SBA_IOVA(ioc, iovp, 0, 0), ioc->ioc_hpa+IOC_PCOM); | |
826 | } | |
827 | ||
828 | /** | |
829 | * sba_dma_supported - PCI driver can query DMA support | |
830 | * @dev: instance of PCI owned by the driver that's asking | |
831 | * @mask: number of address bits this PCI device can handle | |
832 | * | |
833 | * See Documentation/DMA-mapping.txt | |
834 | */ | |
835 | static int sba_dma_supported( struct device *dev, u64 mask) | |
836 | { | |
837 | struct ioc *ioc; | |
64908ad9 | 838 | |
1da177e4 LT |
839 | if (dev == NULL) { |
840 | printk(KERN_ERR MODULE_NAME ": EISA/ISA/et al not supported\n"); | |
841 | BUG(); | |
842 | return(0); | |
843 | } | |
844 | ||
64908ad9 GG |
845 | /* Documentation/DMA-mapping.txt tells drivers to try 64-bit first, |
846 | * then fall back to 32-bit if that fails. | |
847 | * We are just "encouraging" 32-bit DMA masks here since we can | |
848 | * never allow IOMMU bypass unless we add special support for ZX1. | |
849 | */ | |
850 | if (mask > ~0U) | |
851 | return 0; | |
1da177e4 | 852 | |
64908ad9 | 853 | ioc = GET_IOC(dev); |
1da177e4 | 854 | |
64908ad9 GG |
855 | /* |
856 | * check if mask is >= than the current max IO Virt Address | |
857 | * The max IO Virt address will *always* < 30 bits. | |
858 | */ | |
859 | return((int)(mask >= (ioc->ibase - 1 + | |
860 | (ioc->pdir_size / sizeof(u64) * IOVP_SIZE) ))); | |
1da177e4 LT |
861 | } |
862 | ||
863 | ||
864 | /** | |
865 | * sba_map_single - map one buffer and return IOVA for DMA | |
866 | * @dev: instance of PCI owned by the driver that's asking. | |
867 | * @addr: driver buffer to map. | |
868 | * @size: number of bytes to map in driver buffer. | |
869 | * @direction: R/W or both. | |
870 | * | |
871 | * See Documentation/DMA-mapping.txt | |
872 | */ | |
873 | static dma_addr_t | |
874 | sba_map_single(struct device *dev, void *addr, size_t size, | |
875 | enum dma_data_direction direction) | |
876 | { | |
877 | struct ioc *ioc; | |
878 | unsigned long flags; | |
879 | dma_addr_t iovp; | |
880 | dma_addr_t offset; | |
881 | u64 *pdir_start; | |
882 | int pide; | |
883 | ||
884 | ioc = GET_IOC(dev); | |
885 | ||
886 | /* save offset bits */ | |
887 | offset = ((dma_addr_t) (long) addr) & ~IOVP_MASK; | |
888 | ||
889 | /* round up to nearest IOVP_SIZE */ | |
890 | size = (size + offset + ~IOVP_MASK) & IOVP_MASK; | |
891 | ||
892 | spin_lock_irqsave(&ioc->res_lock, flags); | |
893 | #ifdef ASSERT_PDIR_SANITY | |
894 | sba_check_pdir(ioc,"Check before sba_map_single()"); | |
895 | #endif | |
896 | ||
897 | #ifdef SBA_COLLECT_STATS | |
898 | ioc->msingle_calls++; | |
899 | ioc->msingle_pages += size >> IOVP_SHIFT; | |
900 | #endif | |
901 | pide = sba_alloc_range(ioc, size); | |
902 | iovp = (dma_addr_t) pide << IOVP_SHIFT; | |
903 | ||
904 | DBG_RUN("%s() 0x%p -> 0x%lx\n", | |
905 | __FUNCTION__, addr, (long) iovp | offset); | |
906 | ||
907 | pdir_start = &(ioc->pdir_base[pide]); | |
908 | ||
909 | while (size > 0) { | |
910 | sba_io_pdir_entry(pdir_start, KERNEL_SPACE, (unsigned long) addr, 0); | |
911 | ||
912 | DBG_RUN(" pdir 0x%p %02x%02x%02x%02x%02x%02x%02x%02x\n", | |
913 | pdir_start, | |
914 | (u8) (((u8 *) pdir_start)[7]), | |
915 | (u8) (((u8 *) pdir_start)[6]), | |
916 | (u8) (((u8 *) pdir_start)[5]), | |
917 | (u8) (((u8 *) pdir_start)[4]), | |
918 | (u8) (((u8 *) pdir_start)[3]), | |
919 | (u8) (((u8 *) pdir_start)[2]), | |
920 | (u8) (((u8 *) pdir_start)[1]), | |
921 | (u8) (((u8 *) pdir_start)[0]) | |
922 | ); | |
923 | ||
924 | addr += IOVP_SIZE; | |
925 | size -= IOVP_SIZE; | |
926 | pdir_start++; | |
927 | } | |
64908ad9 GG |
928 | |
929 | /* force FDC ops in io_pdir_entry() to be visible to IOMMU */ | |
930 | if (ioc_needs_fdc) | |
931 | asm volatile("sync" : : ); | |
932 | ||
1da177e4 LT |
933 | #ifdef ASSERT_PDIR_SANITY |
934 | sba_check_pdir(ioc,"Check after sba_map_single()"); | |
935 | #endif | |
936 | spin_unlock_irqrestore(&ioc->res_lock, flags); | |
64908ad9 GG |
937 | |
938 | /* form complete address */ | |
1da177e4 LT |
939 | return SBA_IOVA(ioc, iovp, offset, DEFAULT_DMA_HINT_REG); |
940 | } | |
941 | ||
942 | ||
943 | /** | |
944 | * sba_unmap_single - unmap one IOVA and free resources | |
945 | * @dev: instance of PCI owned by the driver that's asking. | |
946 | * @iova: IOVA of driver buffer previously mapped. | |
947 | * @size: number of bytes mapped in driver buffer. | |
948 | * @direction: R/W or both. | |
949 | * | |
950 | * See Documentation/DMA-mapping.txt | |
951 | */ | |
952 | static void | |
953 | sba_unmap_single(struct device *dev, dma_addr_t iova, size_t size, | |
954 | enum dma_data_direction direction) | |
955 | { | |
956 | struct ioc *ioc; | |
957 | #if DELAYED_RESOURCE_CNT > 0 | |
958 | struct sba_dma_pair *d; | |
959 | #endif | |
960 | unsigned long flags; | |
961 | dma_addr_t offset; | |
962 | ||
963 | DBG_RUN("%s() iovp 0x%lx/%x\n", __FUNCTION__, (long) iova, size); | |
964 | ||
965 | ioc = GET_IOC(dev); | |
966 | offset = iova & ~IOVP_MASK; | |
967 | iova ^= offset; /* clear offset bits */ | |
968 | size += offset; | |
969 | size = ROUNDUP(size, IOVP_SIZE); | |
970 | ||
971 | spin_lock_irqsave(&ioc->res_lock, flags); | |
972 | ||
973 | #ifdef SBA_COLLECT_STATS | |
974 | ioc->usingle_calls++; | |
975 | ioc->usingle_pages += size >> IOVP_SHIFT; | |
976 | #endif | |
977 | ||
978 | sba_mark_invalid(ioc, iova, size); | |
979 | ||
980 | #if DELAYED_RESOURCE_CNT > 0 | |
981 | /* Delaying when we re-use a IO Pdir entry reduces the number | |
982 | * of MMIO reads needed to flush writes to the PCOM register. | |
983 | */ | |
984 | d = &(ioc->saved[ioc->saved_cnt]); | |
985 | d->iova = iova; | |
986 | d->size = size; | |
987 | if (++(ioc->saved_cnt) >= DELAYED_RESOURCE_CNT) { | |
988 | int cnt = ioc->saved_cnt; | |
989 | while (cnt--) { | |
990 | sba_free_range(ioc, d->iova, d->size); | |
991 | d--; | |
992 | } | |
993 | ioc->saved_cnt = 0; | |
64908ad9 | 994 | |
1da177e4 LT |
995 | READ_REG(ioc->ioc_hpa+IOC_PCOM); /* flush purges */ |
996 | } | |
997 | #else /* DELAYED_RESOURCE_CNT == 0 */ | |
998 | sba_free_range(ioc, iova, size); | |
64908ad9 GG |
999 | |
1000 | /* If fdc's were issued, force fdc's to be visible now */ | |
1001 | if (ioc_needs_fdc) | |
1002 | asm volatile("sync" : : ); | |
1003 | ||
1da177e4 LT |
1004 | READ_REG(ioc->ioc_hpa+IOC_PCOM); /* flush purges */ |
1005 | #endif /* DELAYED_RESOURCE_CNT == 0 */ | |
64908ad9 | 1006 | |
1da177e4 LT |
1007 | spin_unlock_irqrestore(&ioc->res_lock, flags); |
1008 | ||
1009 | /* XXX REVISIT for 2.5 Linux - need syncdma for zero-copy support. | |
1010 | ** For Astro based systems this isn't a big deal WRT performance. | |
1011 | ** As long as 2.4 kernels copyin/copyout data from/to userspace, | |
1012 | ** we don't need the syncdma. The issue here is I/O MMU cachelines | |
1013 | ** are *not* coherent in all cases. May be hwrev dependent. | |
1014 | ** Need to investigate more. | |
1015 | asm volatile("syncdma"); | |
1016 | */ | |
1017 | } | |
1018 | ||
1019 | ||
1020 | /** | |
1021 | * sba_alloc_consistent - allocate/map shared mem for DMA | |
1022 | * @hwdev: instance of PCI owned by the driver that's asking. | |
1023 | * @size: number of bytes mapped in driver buffer. | |
1024 | * @dma_handle: IOVA of new buffer. | |
1025 | * | |
1026 | * See Documentation/DMA-mapping.txt | |
1027 | */ | |
1028 | static void *sba_alloc_consistent(struct device *hwdev, size_t size, | |
5c1fb41f | 1029 | dma_addr_t *dma_handle, gfp_t gfp) |
1da177e4 LT |
1030 | { |
1031 | void *ret; | |
1032 | ||
1033 | if (!hwdev) { | |
1034 | /* only support PCI */ | |
1035 | *dma_handle = 0; | |
1036 | return 0; | |
1037 | } | |
1038 | ||
1039 | ret = (void *) __get_free_pages(gfp, get_order(size)); | |
1040 | ||
1041 | if (ret) { | |
1042 | memset(ret, 0, size); | |
1043 | *dma_handle = sba_map_single(hwdev, ret, size, 0); | |
1044 | } | |
1045 | ||
1046 | return ret; | |
1047 | } | |
1048 | ||
1049 | ||
1050 | /** | |
1051 | * sba_free_consistent - free/unmap shared mem for DMA | |
1052 | * @hwdev: instance of PCI owned by the driver that's asking. | |
1053 | * @size: number of bytes mapped in driver buffer. | |
1054 | * @vaddr: virtual address IOVA of "consistent" buffer. | |
1055 | * @dma_handler: IO virtual address of "consistent" buffer. | |
1056 | * | |
1057 | * See Documentation/DMA-mapping.txt | |
1058 | */ | |
1059 | static void | |
1060 | sba_free_consistent(struct device *hwdev, size_t size, void *vaddr, | |
1061 | dma_addr_t dma_handle) | |
1062 | { | |
1063 | sba_unmap_single(hwdev, dma_handle, size, 0); | |
1064 | free_pages((unsigned long) vaddr, get_order(size)); | |
1065 | } | |
1066 | ||
1067 | ||
1068 | /* | |
1069 | ** Since 0 is a valid pdir_base index value, can't use that | |
1070 | ** to determine if a value is valid or not. Use a flag to indicate | |
1071 | ** the SG list entry contains a valid pdir index. | |
1072 | */ | |
1073 | #define PIDE_FLAG 0x80000000UL | |
1074 | ||
1075 | #ifdef SBA_COLLECT_STATS | |
1076 | #define IOMMU_MAP_STATS | |
1077 | #endif | |
1078 | #include "iommu-helpers.h" | |
1079 | ||
1080 | #ifdef DEBUG_LARGE_SG_ENTRIES | |
1081 | int dump_run_sg = 0; | |
1082 | #endif | |
1083 | ||
1084 | ||
1085 | /** | |
1086 | * sba_map_sg - map Scatter/Gather list | |
1087 | * @dev: instance of PCI owned by the driver that's asking. | |
1088 | * @sglist: array of buffer/length pairs | |
1089 | * @nents: number of entries in list | |
1090 | * @direction: R/W or both. | |
1091 | * | |
1092 | * See Documentation/DMA-mapping.txt | |
1093 | */ | |
1094 | static int | |
1095 | sba_map_sg(struct device *dev, struct scatterlist *sglist, int nents, | |
1096 | enum dma_data_direction direction) | |
1097 | { | |
1098 | struct ioc *ioc; | |
1099 | int coalesced, filled = 0; | |
1100 | unsigned long flags; | |
1101 | ||
1102 | DBG_RUN_SG("%s() START %d entries\n", __FUNCTION__, nents); | |
1103 | ||
1104 | ioc = GET_IOC(dev); | |
1105 | ||
1106 | /* Fast path single entry scatterlists. */ | |
1107 | if (nents == 1) { | |
1108 | sg_dma_address(sglist) = sba_map_single(dev, | |
1109 | (void *)sg_virt_addr(sglist), | |
1110 | sglist->length, direction); | |
1111 | sg_dma_len(sglist) = sglist->length; | |
1112 | return 1; | |
1113 | } | |
1114 | ||
1115 | spin_lock_irqsave(&ioc->res_lock, flags); | |
1116 | ||
1117 | #ifdef ASSERT_PDIR_SANITY | |
1118 | if (sba_check_pdir(ioc,"Check before sba_map_sg()")) | |
1119 | { | |
1120 | sba_dump_sg(ioc, sglist, nents); | |
1121 | panic("Check before sba_map_sg()"); | |
1122 | } | |
1123 | #endif | |
1124 | ||
1125 | #ifdef SBA_COLLECT_STATS | |
1126 | ioc->msg_calls++; | |
1127 | #endif | |
1128 | ||
1129 | /* | |
1130 | ** First coalesce the chunks and allocate I/O pdir space | |
1131 | ** | |
1132 | ** If this is one DMA stream, we can properly map using the | |
1133 | ** correct virtual address associated with each DMA page. | |
1134 | ** w/o this association, we wouldn't have coherent DMA! | |
1135 | ** Access to the virtual address is what forces a two pass algorithm. | |
1136 | */ | |
1137 | coalesced = iommu_coalesce_chunks(ioc, sglist, nents, sba_alloc_range); | |
1138 | ||
1139 | /* | |
1140 | ** Program the I/O Pdir | |
1141 | ** | |
1142 | ** map the virtual addresses to the I/O Pdir | |
1143 | ** o dma_address will contain the pdir index | |
1144 | ** o dma_len will contain the number of bytes to map | |
1145 | ** o address contains the virtual address. | |
1146 | */ | |
1147 | filled = iommu_fill_pdir(ioc, sglist, nents, 0, sba_io_pdir_entry); | |
1148 | ||
64908ad9 GG |
1149 | /* force FDC ops in io_pdir_entry() to be visible to IOMMU */ |
1150 | if (ioc_needs_fdc) | |
1151 | asm volatile("sync" : : ); | |
1152 | ||
1da177e4 LT |
1153 | #ifdef ASSERT_PDIR_SANITY |
1154 | if (sba_check_pdir(ioc,"Check after sba_map_sg()")) | |
1155 | { | |
1156 | sba_dump_sg(ioc, sglist, nents); | |
1157 | panic("Check after sba_map_sg()\n"); | |
1158 | } | |
1159 | #endif | |
1160 | ||
1161 | spin_unlock_irqrestore(&ioc->res_lock, flags); | |
1162 | ||
1163 | DBG_RUN_SG("%s() DONE %d mappings\n", __FUNCTION__, filled); | |
1164 | ||
1165 | return filled; | |
1166 | } | |
1167 | ||
1168 | ||
1169 | /** | |
1170 | * sba_unmap_sg - unmap Scatter/Gather list | |
1171 | * @dev: instance of PCI owned by the driver that's asking. | |
1172 | * @sglist: array of buffer/length pairs | |
1173 | * @nents: number of entries in list | |
1174 | * @direction: R/W or both. | |
1175 | * | |
1176 | * See Documentation/DMA-mapping.txt | |
1177 | */ | |
1178 | static void | |
1179 | sba_unmap_sg(struct device *dev, struct scatterlist *sglist, int nents, | |
1180 | enum dma_data_direction direction) | |
1181 | { | |
1182 | struct ioc *ioc; | |
1183 | #ifdef ASSERT_PDIR_SANITY | |
1184 | unsigned long flags; | |
1185 | #endif | |
1186 | ||
1187 | DBG_RUN_SG("%s() START %d entries, %p,%x\n", | |
1188 | __FUNCTION__, nents, sg_virt_addr(sglist), sglist->length); | |
1189 | ||
1190 | ioc = GET_IOC(dev); | |
1191 | ||
1192 | #ifdef SBA_COLLECT_STATS | |
1193 | ioc->usg_calls++; | |
1194 | #endif | |
1195 | ||
1196 | #ifdef ASSERT_PDIR_SANITY | |
1197 | spin_lock_irqsave(&ioc->res_lock, flags); | |
1198 | sba_check_pdir(ioc,"Check before sba_unmap_sg()"); | |
1199 | spin_unlock_irqrestore(&ioc->res_lock, flags); | |
1200 | #endif | |
1201 | ||
1202 | while (sg_dma_len(sglist) && nents--) { | |
1203 | ||
1204 | sba_unmap_single(dev, sg_dma_address(sglist), sg_dma_len(sglist), direction); | |
1205 | #ifdef SBA_COLLECT_STATS | |
1206 | ioc->usg_pages += ((sg_dma_address(sglist) & ~IOVP_MASK) + sg_dma_len(sglist) + IOVP_SIZE - 1) >> PAGE_SHIFT; | |
1207 | ioc->usingle_calls--; /* kluge since call is unmap_sg() */ | |
1208 | #endif | |
1209 | ++sglist; | |
1210 | } | |
1211 | ||
1212 | DBG_RUN_SG("%s() DONE (nents %d)\n", __FUNCTION__, nents); | |
1213 | ||
1214 | #ifdef ASSERT_PDIR_SANITY | |
1215 | spin_lock_irqsave(&ioc->res_lock, flags); | |
1216 | sba_check_pdir(ioc,"Check after sba_unmap_sg()"); | |
1217 | spin_unlock_irqrestore(&ioc->res_lock, flags); | |
1218 | #endif | |
1219 | ||
1220 | } | |
1221 | ||
1222 | static struct hppa_dma_ops sba_ops = { | |
1223 | .dma_supported = sba_dma_supported, | |
1224 | .alloc_consistent = sba_alloc_consistent, | |
1225 | .alloc_noncoherent = sba_alloc_consistent, | |
1226 | .free_consistent = sba_free_consistent, | |
1227 | .map_single = sba_map_single, | |
1228 | .unmap_single = sba_unmap_single, | |
1229 | .map_sg = sba_map_sg, | |
1230 | .unmap_sg = sba_unmap_sg, | |
1231 | .dma_sync_single_for_cpu = NULL, | |
1232 | .dma_sync_single_for_device = NULL, | |
1233 | .dma_sync_sg_for_cpu = NULL, | |
1234 | .dma_sync_sg_for_device = NULL, | |
1235 | }; | |
1236 | ||
1237 | ||
1238 | /************************************************************************** | |
1239 | ** | |
1240 | ** SBA PAT PDC support | |
1241 | ** | |
1242 | ** o call pdc_pat_cell_module() | |
1243 | ** o store ranges in PCI "resource" structures | |
1244 | ** | |
1245 | **************************************************************************/ | |
1246 | ||
1247 | static void | |
1248 | sba_get_pat_resources(struct sba_device *sba_dev) | |
1249 | { | |
1250 | #if 0 | |
1251 | /* | |
1252 | ** TODO/REVISIT/FIXME: support for directed ranges requires calls to | |
1253 | ** PAT PDC to program the SBA/LBA directed range registers...this | |
1254 | ** burden may fall on the LBA code since it directly supports the | |
1255 | ** PCI subsystem. It's not clear yet. - ggg | |
1256 | */ | |
1257 | PAT_MOD(mod)->mod_info.mod_pages = PAT_GET_MOD_PAGES(temp); | |
1258 | FIXME : ??? | |
1259 | PAT_MOD(mod)->mod_info.dvi = PAT_GET_DVI(temp); | |
1260 | Tells where the dvi bits are located in the address. | |
1261 | PAT_MOD(mod)->mod_info.ioc = PAT_GET_IOC(temp); | |
1262 | FIXME : ??? | |
1263 | #endif | |
1264 | } | |
1265 | ||
1266 | ||
1267 | /************************************************************** | |
1268 | * | |
1269 | * Initialization and claim | |
1270 | * | |
1271 | ***************************************************************/ | |
1272 | #define PIRANHA_ADDR_MASK 0x00160000UL /* bit 17,18,20 */ | |
1273 | #define PIRANHA_ADDR_VAL 0x00060000UL /* bit 17,18 on */ | |
1274 | static void * | |
1275 | sba_alloc_pdir(unsigned int pdir_size) | |
1276 | { | |
1277 | unsigned long pdir_base; | |
1278 | unsigned long pdir_order = get_order(pdir_size); | |
1279 | ||
1280 | pdir_base = __get_free_pages(GFP_KERNEL, pdir_order); | |
64908ad9 GG |
1281 | if (NULL == (void *) pdir_base) { |
1282 | panic("%s() could not allocate I/O Page Table\n", | |
1283 | __FUNCTION__); | |
1284 | } | |
1da177e4 LT |
1285 | |
1286 | /* If this is not PA8700 (PCX-W2) | |
1287 | ** OR newer than ver 2.2 | |
1288 | ** OR in a system that doesn't need VINDEX bits from SBA, | |
1289 | ** | |
1290 | ** then we aren't exposed to the HW bug. | |
1291 | */ | |
1292 | if ( ((boot_cpu_data.pdc.cpuid >> 5) & 0x7f) != 0x13 | |
1293 | || (boot_cpu_data.pdc.versions > 0x202) | |
1294 | || (boot_cpu_data.pdc.capabilities & 0x08L) ) | |
1295 | return (void *) pdir_base; | |
1296 | ||
1297 | /* | |
1298 | * PA8700 (PCX-W2, aka piranha) silent data corruption fix | |
1299 | * | |
1300 | * An interaction between PA8700 CPU (Ver 2.2 or older) and | |
1301 | * Ike/Astro can cause silent data corruption. This is only | |
1302 | * a problem if the I/O PDIR is located in memory such that | |
1303 | * (little-endian) bits 17 and 18 are on and bit 20 is off. | |
1304 | * | |
1305 | * Since the max IO Pdir size is 2MB, by cleverly allocating the | |
1306 | * right physical address, we can either avoid (IOPDIR <= 1MB) | |
1307 | * or minimize (2MB IO Pdir) the problem if we restrict the | |
1308 | * IO Pdir to a maximum size of 2MB-128K (1902K). | |
1309 | * | |
1310 | * Because we always allocate 2^N sized IO pdirs, either of the | |
1311 | * "bad" regions will be the last 128K if at all. That's easy | |
1312 | * to test for. | |
1313 | * | |
1314 | */ | |
1315 | if (pdir_order <= (19-12)) { | |
1316 | if (((virt_to_phys(pdir_base)+pdir_size-1) & PIRANHA_ADDR_MASK) == PIRANHA_ADDR_VAL) { | |
1317 | /* allocate a new one on 512k alignment */ | |
1318 | unsigned long new_pdir = __get_free_pages(GFP_KERNEL, (19-12)); | |
1319 | /* release original */ | |
1320 | free_pages(pdir_base, pdir_order); | |
1321 | ||
1322 | pdir_base = new_pdir; | |
1323 | ||
1324 | /* release excess */ | |
1325 | while (pdir_order < (19-12)) { | |
1326 | new_pdir += pdir_size; | |
1327 | free_pages(new_pdir, pdir_order); | |
1328 | pdir_order +=1; | |
1329 | pdir_size <<=1; | |
1330 | } | |
1331 | } | |
1332 | } else { | |
1333 | /* | |
1334 | ** 1MB or 2MB Pdir | |
1335 | ** Needs to be aligned on an "odd" 1MB boundary. | |
1336 | */ | |
1337 | unsigned long new_pdir = __get_free_pages(GFP_KERNEL, pdir_order+1); /* 2 or 4MB */ | |
1338 | ||
1339 | /* release original */ | |
1340 | free_pages( pdir_base, pdir_order); | |
1341 | ||
1342 | /* release first 1MB */ | |
1343 | free_pages(new_pdir, 20-12); | |
1344 | ||
1345 | pdir_base = new_pdir + 1024*1024; | |
1346 | ||
1347 | if (pdir_order > (20-12)) { | |
1348 | /* | |
1349 | ** 2MB Pdir. | |
1350 | ** | |
1351 | ** Flag tells init_bitmap() to mark bad 128k as used | |
1352 | ** and to reduce the size by 128k. | |
1353 | */ | |
1354 | piranha_bad_128k = 1; | |
1355 | ||
1356 | new_pdir += 3*1024*1024; | |
1357 | /* release last 1MB */ | |
1358 | free_pages(new_pdir, 20-12); | |
1359 | ||
1360 | /* release unusable 128KB */ | |
1361 | free_pages(new_pdir - 128*1024 , 17-12); | |
1362 | ||
1363 | pdir_size -= 128*1024; | |
1364 | } | |
1365 | } | |
1366 | ||
1367 | memset((void *) pdir_base, 0, pdir_size); | |
1368 | return (void *) pdir_base; | |
1369 | } | |
1370 | ||
56583747 MW |
1371 | static struct device *next_device(struct klist_iter *i) |
1372 | { | |
1373 | struct klist_node * n = klist_next(i); | |
1374 | return n ? container_of(n, struct device, knode_parent) : NULL; | |
1375 | } | |
1376 | ||
1da177e4 | 1377 | /* setup Mercury or Elroy IBASE/IMASK registers. */ |
56583747 MW |
1378 | static void |
1379 | setup_ibase_imask(struct parisc_device *sba, struct ioc *ioc, int ioc_num) | |
1da177e4 | 1380 | { |
56583747 | 1381 | /* lba_set_iregs() is in drivers/parisc/lba_pci.c */ |
1da177e4 LT |
1382 | extern void lba_set_iregs(struct parisc_device *, u32, u32); |
1383 | struct device *dev; | |
56583747 | 1384 | struct klist_iter i; |
1da177e4 | 1385 | |
56583747 MW |
1386 | klist_iter_init(&sba->dev.klist_children, &i); |
1387 | while ((dev = next_device(&i))) { | |
1da177e4 | 1388 | struct parisc_device *lba = to_parisc_device(dev); |
56583747 | 1389 | int rope_num = (lba->hpa.start >> 13) & 0xf; |
1da177e4 LT |
1390 | if (rope_num >> 3 == ioc_num) |
1391 | lba_set_iregs(lba, ioc->ibase, ioc->imask); | |
1392 | } | |
56583747 | 1393 | klist_iter_exit(&i); |
1da177e4 LT |
1394 | } |
1395 | ||
1396 | static void | |
1397 | sba_ioc_init_pluto(struct parisc_device *sba, struct ioc *ioc, int ioc_num) | |
1398 | { | |
1399 | u32 iova_space_mask; | |
1400 | u32 iova_space_size; | |
1401 | int iov_order, tcnfg; | |
64908ad9 | 1402 | #ifdef SBA_AGP_SUPPORT |
1da177e4 LT |
1403 | int agp_found = 0; |
1404 | #endif | |
1405 | /* | |
1406 | ** Firmware programs the base and size of a "safe IOVA space" | |
1407 | ** (one that doesn't overlap memory or LMMIO space) in the | |
1408 | ** IBASE and IMASK registers. | |
1409 | */ | |
1410 | ioc->ibase = READ_REG(ioc->ioc_hpa + IOC_IBASE); | |
1411 | iova_space_size = ~(READ_REG(ioc->ioc_hpa + IOC_IMASK) & 0xFFFFFFFFUL) + 1; | |
1412 | ||
1413 | if ((ioc->ibase < 0xfed00000UL) && ((ioc->ibase + iova_space_size) > 0xfee00000UL)) { | |
1414 | printk("WARNING: IOV space overlaps local config and interrupt message, truncating\n"); | |
1415 | iova_space_size /= 2; | |
1416 | } | |
1417 | ||
1418 | /* | |
1419 | ** iov_order is always based on a 1GB IOVA space since we want to | |
1420 | ** turn on the other half for AGP GART. | |
1421 | */ | |
1422 | iov_order = get_order(iova_space_size >> (IOVP_SHIFT - PAGE_SHIFT)); | |
1423 | ioc->pdir_size = (iova_space_size / IOVP_SIZE) * sizeof(u64); | |
1424 | ||
1425 | DBG_INIT("%s() hpa 0x%lx IOV %dMB (%d bits)\n", | |
1426 | __FUNCTION__, ioc->ioc_hpa, iova_space_size >> 20, | |
1427 | iov_order + PAGE_SHIFT); | |
1428 | ||
1429 | ioc->pdir_base = (void *) __get_free_pages(GFP_KERNEL, | |
1430 | get_order(ioc->pdir_size)); | |
1431 | if (!ioc->pdir_base) | |
1432 | panic("Couldn't allocate I/O Page Table\n"); | |
1433 | ||
1434 | memset(ioc->pdir_base, 0, ioc->pdir_size); | |
1435 | ||
1436 | DBG_INIT("%s() pdir %p size %x\n", | |
1437 | __FUNCTION__, ioc->pdir_base, ioc->pdir_size); | |
1438 | ||
64908ad9 | 1439 | #ifdef SBA_HINT_SUPPORT |
1da177e4 LT |
1440 | ioc->hint_shift_pdir = iov_order + PAGE_SHIFT; |
1441 | ioc->hint_mask_pdir = ~(0x3 << (iov_order + PAGE_SHIFT)); | |
1442 | ||
1443 | DBG_INIT(" hint_shift_pdir %x hint_mask_pdir %lx\n", | |
1444 | ioc->hint_shift_pdir, ioc->hint_mask_pdir); | |
1445 | #endif | |
1446 | ||
1447 | WARN_ON((((unsigned long) ioc->pdir_base) & PAGE_MASK) != (unsigned long) ioc->pdir_base); | |
1448 | WRITE_REG(virt_to_phys(ioc->pdir_base), ioc->ioc_hpa + IOC_PDIR_BASE); | |
1449 | ||
1450 | /* build IMASK for IOC and Elroy */ | |
1451 | iova_space_mask = 0xffffffff; | |
1452 | iova_space_mask <<= (iov_order + PAGE_SHIFT); | |
1453 | ioc->imask = iova_space_mask; | |
1454 | #ifdef ZX1_SUPPORT | |
1455 | ioc->iovp_mask = ~(iova_space_mask + PAGE_SIZE - 1); | |
1456 | #endif | |
1457 | sba_dump_tlb(ioc->ioc_hpa); | |
1458 | ||
1459 | setup_ibase_imask(sba, ioc, ioc_num); | |
1460 | ||
1461 | WRITE_REG(ioc->imask, ioc->ioc_hpa + IOC_IMASK); | |
1462 | ||
64908ad9 | 1463 | #ifdef CONFIG_64BIT |
1da177e4 LT |
1464 | /* |
1465 | ** Setting the upper bits makes checking for bypass addresses | |
1466 | ** a little faster later on. | |
1467 | */ | |
1468 | ioc->imask |= 0xFFFFFFFF00000000UL; | |
1469 | #endif | |
1470 | ||
1471 | /* Set I/O PDIR Page size to system page size */ | |
1472 | switch (PAGE_SHIFT) { | |
1473 | case 12: tcnfg = 0; break; /* 4K */ | |
1474 | case 13: tcnfg = 1; break; /* 8K */ | |
1475 | case 14: tcnfg = 2; break; /* 16K */ | |
1476 | case 16: tcnfg = 3; break; /* 64K */ | |
1477 | default: | |
1478 | panic(__FILE__ "Unsupported system page size %d", | |
1479 | 1 << PAGE_SHIFT); | |
1480 | break; | |
1481 | } | |
1482 | WRITE_REG(tcnfg, ioc->ioc_hpa + IOC_TCNFG); | |
1483 | ||
1484 | /* | |
1485 | ** Program the IOC's ibase and enable IOVA translation | |
1486 | ** Bit zero == enable bit. | |
1487 | */ | |
1488 | WRITE_REG(ioc->ibase | 1, ioc->ioc_hpa + IOC_IBASE); | |
1489 | ||
1490 | /* | |
1491 | ** Clear I/O TLB of any possible entries. | |
1492 | ** (Yes. This is a bit paranoid...but so what) | |
1493 | */ | |
1494 | WRITE_REG(ioc->ibase | 31, ioc->ioc_hpa + IOC_PCOM); | |
1495 | ||
64908ad9 | 1496 | #ifdef SBA_AGP_SUPPORT |
1da177e4 LT |
1497 | /* |
1498 | ** If an AGP device is present, only use half of the IOV space | |
1499 | ** for PCI DMA. Unfortunately we can't know ahead of time | |
1500 | ** whether GART support will actually be used, for now we | |
1501 | ** can just key on any AGP device found in the system. | |
1502 | ** We program the next pdir index after we stop w/ a key for | |
1503 | ** the GART code to handshake on. | |
1504 | */ | |
1505 | device=NULL; | |
1506 | for (lba = sba->child; lba; lba = lba->sibling) { | |
1507 | if (IS_QUICKSILVER(lba)) | |
1508 | break; | |
1509 | } | |
1510 | ||
1511 | if (lba) { | |
1512 | DBG_INIT("%s: Reserving half of IOVA space for AGP GART support\n", __FUNCTION__); | |
1513 | ioc->pdir_size /= 2; | |
1514 | ((u64 *)ioc->pdir_base)[PDIR_INDEX(iova_space_size/2)] = SBA_IOMMU_COOKIE; | |
1515 | } else { | |
1516 | DBG_INIT("%s: No GART needed - no AGP controller found\n", __FUNCTION__); | |
1517 | } | |
1518 | #endif /* 0 */ | |
1519 | ||
1520 | } | |
1521 | ||
1522 | static void | |
1523 | sba_ioc_init(struct parisc_device *sba, struct ioc *ioc, int ioc_num) | |
1524 | { | |
1525 | u32 iova_space_size, iova_space_mask; | |
1526 | unsigned int pdir_size, iov_order; | |
1527 | ||
1528 | /* | |
1529 | ** Determine IOVA Space size from memory size. | |
1530 | ** | |
1531 | ** Ideally, PCI drivers would register the maximum number | |
1532 | ** of DMA they can have outstanding for each device they | |
1533 | ** own. Next best thing would be to guess how much DMA | |
1534 | ** can be outstanding based on PCI Class/sub-class. Both | |
1535 | ** methods still require some "extra" to support PCI | |
1536 | ** Hot-Plug/Removal of PCI cards. (aka PCI OLARD). | |
1537 | ** | |
1538 | ** While we have 32-bits "IOVA" space, top two 2 bits are used | |
1539 | ** for DMA hints - ergo only 30 bits max. | |
1540 | */ | |
1541 | ||
1542 | iova_space_size = (u32) (num_physpages/global_ioc_cnt); | |
1543 | ||
1544 | /* limit IOVA space size to 1MB-1GB */ | |
1545 | if (iova_space_size < (1 << (20 - PAGE_SHIFT))) { | |
1546 | iova_space_size = 1 << (20 - PAGE_SHIFT); | |
1547 | } | |
1da177e4 LT |
1548 | else if (iova_space_size > (1 << (30 - PAGE_SHIFT))) { |
1549 | iova_space_size = 1 << (30 - PAGE_SHIFT); | |
1550 | } | |
1da177e4 LT |
1551 | |
1552 | /* | |
1553 | ** iova space must be log2() in size. | |
1554 | ** thus, pdir/res_map will also be log2(). | |
1555 | ** PIRANHA BUG: Exception is when IO Pdir is 2MB (gets reduced) | |
1556 | */ | |
1557 | iov_order = get_order(iova_space_size << PAGE_SHIFT); | |
1558 | ||
1559 | /* iova_space_size is now bytes, not pages */ | |
1560 | iova_space_size = 1 << (iov_order + PAGE_SHIFT); | |
1561 | ||
1562 | ioc->pdir_size = pdir_size = (iova_space_size/IOVP_SIZE) * sizeof(u64); | |
1563 | ||
1564 | DBG_INIT("%s() hpa 0x%lx mem %ldMB IOV %dMB (%d bits)\n", | |
1565 | __FUNCTION__, | |
1566 | ioc->ioc_hpa, | |
1567 | (unsigned long) num_physpages >> (20 - PAGE_SHIFT), | |
1568 | iova_space_size>>20, | |
1569 | iov_order + PAGE_SHIFT); | |
1570 | ||
1571 | ioc->pdir_base = sba_alloc_pdir(pdir_size); | |
1572 | ||
1573 | DBG_INIT("%s() pdir %p size %x\n", | |
1574 | __FUNCTION__, ioc->pdir_base, pdir_size); | |
1575 | ||
64908ad9 | 1576 | #ifdef SBA_HINT_SUPPORT |
1da177e4 LT |
1577 | /* FIXME : DMA HINTs not used */ |
1578 | ioc->hint_shift_pdir = iov_order + PAGE_SHIFT; | |
1579 | ioc->hint_mask_pdir = ~(0x3 << (iov_order + PAGE_SHIFT)); | |
1580 | ||
1581 | DBG_INIT(" hint_shift_pdir %x hint_mask_pdir %lx\n", | |
1582 | ioc->hint_shift_pdir, ioc->hint_mask_pdir); | |
1583 | #endif | |
1584 | ||
1585 | WRITE_REG64(virt_to_phys(ioc->pdir_base), ioc->ioc_hpa + IOC_PDIR_BASE); | |
1586 | ||
1587 | /* build IMASK for IOC and Elroy */ | |
1588 | iova_space_mask = 0xffffffff; | |
1589 | iova_space_mask <<= (iov_order + PAGE_SHIFT); | |
1590 | ||
1591 | /* | |
1592 | ** On C3000 w/512MB mem, HP-UX 10.20 reports: | |
1593 | ** ibase=0, imask=0xFE000000, size=0x2000000. | |
1594 | */ | |
1595 | ioc->ibase = 0; | |
1596 | ioc->imask = iova_space_mask; /* save it */ | |
1597 | #ifdef ZX1_SUPPORT | |
1598 | ioc->iovp_mask = ~(iova_space_mask + PAGE_SIZE - 1); | |
1599 | #endif | |
1600 | ||
1601 | DBG_INIT("%s() IOV base 0x%lx mask 0x%0lx\n", | |
1602 | __FUNCTION__, ioc->ibase, ioc->imask); | |
1603 | ||
1604 | /* | |
1605 | ** FIXME: Hint registers are programmed with default hint | |
1606 | ** values during boot, so hints should be sane even if we | |
1607 | ** can't reprogram them the way drivers want. | |
1608 | */ | |
1609 | ||
1610 | setup_ibase_imask(sba, ioc, ioc_num); | |
1611 | ||
1612 | /* | |
1613 | ** Program the IOC's ibase and enable IOVA translation | |
1614 | */ | |
1615 | WRITE_REG(ioc->ibase | 1, ioc->ioc_hpa+IOC_IBASE); | |
1616 | WRITE_REG(ioc->imask, ioc->ioc_hpa+IOC_IMASK); | |
1617 | ||
1618 | /* Set I/O PDIR Page size to 4K */ | |
1619 | WRITE_REG(0, ioc->ioc_hpa+IOC_TCNFG); | |
1620 | ||
1621 | /* | |
1622 | ** Clear I/O TLB of any possible entries. | |
1623 | ** (Yes. This is a bit paranoid...but so what) | |
1624 | */ | |
1625 | WRITE_REG(0 | 31, ioc->ioc_hpa+IOC_PCOM); | |
1626 | ||
1627 | ioc->ibase = 0; /* used by SBA_IOVA and related macros */ | |
1628 | ||
1629 | DBG_INIT("%s() DONE\n", __FUNCTION__); | |
1630 | } | |
1631 | ||
1632 | ||
1633 | ||
1634 | /************************************************************************** | |
1635 | ** | |
1636 | ** SBA initialization code (HW and SW) | |
1637 | ** | |
1638 | ** o identify SBA chip itself | |
1639 | ** o initialize SBA chip modes (HardFail) | |
1640 | ** o initialize SBA chip modes (HardFail) | |
1641 | ** o FIXME: initialize DMA hints for reasonable defaults | |
1642 | ** | |
1643 | **************************************************************************/ | |
1644 | ||
1645 | static void __iomem *ioc_remap(struct sba_device *sba_dev, int offset) | |
1646 | { | |
53f01bba | 1647 | return ioremap(sba_dev->dev->hpa.start + offset, SBA_FUNC_SIZE); |
1da177e4 LT |
1648 | } |
1649 | ||
1650 | static void sba_hw_init(struct sba_device *sba_dev) | |
1651 | { | |
1652 | int i; | |
1653 | int num_ioc; | |
1654 | u64 ioc_ctl; | |
1655 | ||
1656 | if (!is_pdc_pat()) { | |
1657 | /* Shutdown the USB controller on Astro-based workstations. | |
1658 | ** Once we reprogram the IOMMU, the next DMA performed by | |
1659 | ** USB will HPMC the box. USB is only enabled if a | |
1660 | ** keyboard is present and found. | |
1661 | ** | |
1662 | ** With serial console, j6k v5.0 firmware says: | |
1663 | ** mem_kbd hpa 0xfee003f8 sba 0x0 pad 0x0 cl_class 0x7 | |
1664 | ** | |
1665 | ** FIXME: Using GFX+USB console at power up but direct | |
1666 | ** linux to serial console is still broken. | |
1667 | ** USB could generate DMA so we must reset USB. | |
1668 | ** The proper sequence would be: | |
1669 | ** o block console output | |
1670 | ** o reset USB device | |
1671 | ** o reprogram serial port | |
1672 | ** o unblock console output | |
1673 | */ | |
1674 | if (PAGE0->mem_kbd.cl_class == CL_KEYBD) { | |
1675 | pdc_io_reset_devices(); | |
1676 | } | |
1677 | ||
1678 | } | |
1679 | ||
1680 | ||
1681 | #if 0 | |
1682 | printk("sba_hw_init(): mem_boot 0x%x 0x%x 0x%x 0x%x\n", PAGE0->mem_boot.hpa, | |
1683 | PAGE0->mem_boot.spa, PAGE0->mem_boot.pad, PAGE0->mem_boot.cl_class); | |
1684 | ||
1685 | /* | |
1686 | ** Need to deal with DMA from LAN. | |
1687 | ** Maybe use page zero boot device as a handle to talk | |
1688 | ** to PDC about which device to shutdown. | |
1689 | ** | |
1690 | ** Netbooting, j6k v5.0 firmware says: | |
1691 | ** mem_boot hpa 0xf4008000 sba 0x0 pad 0x0 cl_class 0x1002 | |
1692 | ** ARGH! invalid class. | |
1693 | */ | |
1694 | if ((PAGE0->mem_boot.cl_class != CL_RANDOM) | |
1695 | && (PAGE0->mem_boot.cl_class != CL_SEQU)) { | |
1696 | pdc_io_reset(); | |
1697 | } | |
1698 | #endif | |
1699 | ||
1700 | if (!IS_PLUTO(sba_dev->iodc)) { | |
1701 | ioc_ctl = READ_REG(sba_dev->sba_hpa+IOC_CTRL); | |
1702 | DBG_INIT("%s() hpa 0x%lx ioc_ctl 0x%Lx ->", | |
1703 | __FUNCTION__, sba_dev->sba_hpa, ioc_ctl); | |
1704 | ioc_ctl &= ~(IOC_CTRL_RM | IOC_CTRL_NC | IOC_CTRL_CE); | |
1705 | ioc_ctl |= IOC_CTRL_DD | IOC_CTRL_D4 | IOC_CTRL_TC; | |
1706 | /* j6700 v1.6 firmware sets 0x294f */ | |
1707 | /* A500 firmware sets 0x4d */ | |
1708 | ||
1709 | WRITE_REG(ioc_ctl, sba_dev->sba_hpa+IOC_CTRL); | |
1710 | ||
1711 | #ifdef DEBUG_SBA_INIT | |
1712 | ioc_ctl = READ_REG64(sba_dev->sba_hpa+IOC_CTRL); | |
1713 | DBG_INIT(" 0x%Lx\n", ioc_ctl); | |
1714 | #endif | |
1715 | } /* if !PLUTO */ | |
1716 | ||
1717 | if (IS_ASTRO(sba_dev->iodc)) { | |
1718 | int err; | |
1719 | /* PAT_PDC (L-class) also reports the same goofy base */ | |
1720 | sba_dev->ioc[0].ioc_hpa = ioc_remap(sba_dev, ASTRO_IOC_OFFSET); | |
1721 | num_ioc = 1; | |
1722 | ||
1723 | sba_dev->chip_resv.name = "Astro Intr Ack"; | |
1724 | sba_dev->chip_resv.start = PCI_F_EXTEND | 0xfef00000UL; | |
1725 | sba_dev->chip_resv.end = PCI_F_EXTEND | (0xff000000UL - 1) ; | |
1726 | err = request_resource(&iomem_resource, &(sba_dev->chip_resv)); | |
b7494554 | 1727 | BUG_ON(err < 0); |
1da177e4 LT |
1728 | |
1729 | } else if (IS_PLUTO(sba_dev->iodc)) { | |
1730 | int err; | |
1731 | ||
1732 | /* We use a negative value for IOC HPA so it gets | |
1733 | * corrected when we add it with IKE's IOC offset. | |
1734 | * Doesnt look clean, but fewer code. | |
1735 | */ | |
1736 | sba_dev->ioc[0].ioc_hpa = ioc_remap(sba_dev, PLUTO_IOC_OFFSET); | |
1737 | num_ioc = 1; | |
1738 | ||
1739 | sba_dev->chip_resv.name = "Pluto Intr/PIOP/VGA"; | |
1740 | sba_dev->chip_resv.start = PCI_F_EXTEND | 0xfee00000UL; | |
1741 | sba_dev->chip_resv.end = PCI_F_EXTEND | (0xff200000UL - 1); | |
1742 | err = request_resource(&iomem_resource, &(sba_dev->chip_resv)); | |
1743 | WARN_ON(err < 0); | |
1744 | ||
1745 | sba_dev->iommu_resv.name = "IOVA Space"; | |
1746 | sba_dev->iommu_resv.start = 0x40000000UL; | |
1747 | sba_dev->iommu_resv.end = 0x50000000UL - 1; | |
1748 | err = request_resource(&iomem_resource, &(sba_dev->iommu_resv)); | |
1749 | WARN_ON(err < 0); | |
1750 | } else { | |
1751 | /* IS_IKE (ie N-class, L3000, L1500) */ | |
1752 | sba_dev->ioc[0].ioc_hpa = ioc_remap(sba_dev, IKE_IOC_OFFSET(0)); | |
1753 | sba_dev->ioc[1].ioc_hpa = ioc_remap(sba_dev, IKE_IOC_OFFSET(1)); | |
1754 | num_ioc = 2; | |
1755 | ||
1756 | /* TODO - LOOKUP Ike/Stretch chipset mem map */ | |
1757 | } | |
1758 | /* XXX: What about Reo? */ | |
1759 | ||
1760 | sba_dev->num_ioc = num_ioc; | |
1761 | for (i = 0; i < num_ioc; i++) { | |
1762 | /* | |
1763 | ** Make sure the box crashes if we get any errors on a rope. | |
1764 | */ | |
1765 | WRITE_REG(HF_ENABLE, sba_dev->ioc[i].ioc_hpa + ROPE0_CTL); | |
1766 | WRITE_REG(HF_ENABLE, sba_dev->ioc[i].ioc_hpa + ROPE1_CTL); | |
1767 | WRITE_REG(HF_ENABLE, sba_dev->ioc[i].ioc_hpa + ROPE2_CTL); | |
1768 | WRITE_REG(HF_ENABLE, sba_dev->ioc[i].ioc_hpa + ROPE3_CTL); | |
1769 | WRITE_REG(HF_ENABLE, sba_dev->ioc[i].ioc_hpa + ROPE4_CTL); | |
1770 | WRITE_REG(HF_ENABLE, sba_dev->ioc[i].ioc_hpa + ROPE5_CTL); | |
1771 | WRITE_REG(HF_ENABLE, sba_dev->ioc[i].ioc_hpa + ROPE6_CTL); | |
1772 | WRITE_REG(HF_ENABLE, sba_dev->ioc[i].ioc_hpa + ROPE7_CTL); | |
1773 | ||
1774 | /* flush out the writes */ | |
1775 | READ_REG(sba_dev->ioc[i].ioc_hpa + ROPE7_CTL); | |
1776 | ||
1777 | DBG_INIT(" ioc[%d] ROPE_CFG 0x%Lx ROPE_DBG 0x%Lx\n", | |
1778 | i, | |
1779 | READ_REG(sba_dev->ioc[i].ioc_hpa + 0x40), | |
1780 | READ_REG(sba_dev->ioc[i].ioc_hpa + 0x50) | |
1781 | ); | |
1782 | DBG_INIT(" STATUS_CONTROL 0x%Lx FLUSH_CTRL 0x%Lx\n", | |
1783 | READ_REG(sba_dev->ioc[i].ioc_hpa + 0x108), | |
1784 | READ_REG(sba_dev->ioc[i].ioc_hpa + 0x400) | |
1785 | ); | |
1786 | ||
1787 | if (IS_PLUTO(sba_dev->iodc)) { | |
1788 | sba_ioc_init_pluto(sba_dev->dev, &(sba_dev->ioc[i]), i); | |
1789 | } else { | |
1790 | sba_ioc_init(sba_dev->dev, &(sba_dev->ioc[i]), i); | |
1791 | } | |
1792 | } | |
1793 | } | |
1794 | ||
1795 | static void | |
1796 | sba_common_init(struct sba_device *sba_dev) | |
1797 | { | |
1798 | int i; | |
1799 | ||
1800 | /* add this one to the head of the list (order doesn't matter) | |
1801 | ** This will be useful for debugging - especially if we get coredumps | |
1802 | */ | |
1803 | sba_dev->next = sba_list; | |
1804 | sba_list = sba_dev; | |
1805 | ||
1806 | for(i=0; i< sba_dev->num_ioc; i++) { | |
1807 | int res_size; | |
1808 | #ifdef DEBUG_DMB_TRAP | |
1809 | extern void iterate_pages(unsigned long , unsigned long , | |
1810 | void (*)(pte_t * , unsigned long), | |
1811 | unsigned long ); | |
1812 | void set_data_memory_break(pte_t * , unsigned long); | |
1813 | #endif | |
1814 | /* resource map size dictated by pdir_size */ | |
1815 | res_size = sba_dev->ioc[i].pdir_size/sizeof(u64); /* entries */ | |
1816 | ||
1817 | /* Second part of PIRANHA BUG */ | |
1818 | if (piranha_bad_128k) { | |
1819 | res_size -= (128*1024)/sizeof(u64); | |
1820 | } | |
1821 | ||
1822 | res_size >>= 3; /* convert bit count to byte count */ | |
1823 | DBG_INIT("%s() res_size 0x%x\n", | |
1824 | __FUNCTION__, res_size); | |
1825 | ||
1826 | sba_dev->ioc[i].res_size = res_size; | |
1827 | sba_dev->ioc[i].res_map = (char *) __get_free_pages(GFP_KERNEL, get_order(res_size)); | |
1828 | ||
1829 | #ifdef DEBUG_DMB_TRAP | |
1830 | iterate_pages( sba_dev->ioc[i].res_map, res_size, | |
1831 | set_data_memory_break, 0); | |
1832 | #endif | |
1833 | ||
1834 | if (NULL == sba_dev->ioc[i].res_map) | |
1835 | { | |
1836 | panic("%s:%s() could not allocate resource map\n", | |
1837 | __FILE__, __FUNCTION__ ); | |
1838 | } | |
1839 | ||
1840 | memset(sba_dev->ioc[i].res_map, 0, res_size); | |
1841 | /* next available IOVP - circular search */ | |
1842 | sba_dev->ioc[i].res_hint = (unsigned long *) | |
1843 | &(sba_dev->ioc[i].res_map[L1_CACHE_BYTES]); | |
1844 | ||
1845 | #ifdef ASSERT_PDIR_SANITY | |
1846 | /* Mark first bit busy - ie no IOVA 0 */ | |
1847 | sba_dev->ioc[i].res_map[0] = 0x80; | |
1848 | sba_dev->ioc[i].pdir_base[0] = 0xeeffc0addbba0080ULL; | |
1849 | #endif | |
1850 | ||
1851 | /* Third (and last) part of PIRANHA BUG */ | |
1852 | if (piranha_bad_128k) { | |
1853 | /* region from +1408K to +1536 is un-usable. */ | |
1854 | ||
1855 | int idx_start = (1408*1024/sizeof(u64)) >> 3; | |
1856 | int idx_end = (1536*1024/sizeof(u64)) >> 3; | |
1857 | long *p_start = (long *) &(sba_dev->ioc[i].res_map[idx_start]); | |
1858 | long *p_end = (long *) &(sba_dev->ioc[i].res_map[idx_end]); | |
1859 | ||
1860 | /* mark that part of the io pdir busy */ | |
1861 | while (p_start < p_end) | |
1862 | *p_start++ = -1; | |
1863 | ||
1864 | } | |
1865 | ||
1866 | #ifdef DEBUG_DMB_TRAP | |
1867 | iterate_pages( sba_dev->ioc[i].res_map, res_size, | |
1868 | set_data_memory_break, 0); | |
1869 | iterate_pages( sba_dev->ioc[i].pdir_base, sba_dev->ioc[i].pdir_size, | |
1870 | set_data_memory_break, 0); | |
1871 | #endif | |
1872 | ||
1873 | DBG_INIT("%s() %d res_map %x %p\n", | |
1874 | __FUNCTION__, i, res_size, sba_dev->ioc[i].res_map); | |
1875 | } | |
1876 | ||
1877 | spin_lock_init(&sba_dev->sba_lock); | |
1878 | ioc_needs_fdc = boot_cpu_data.pdc.capabilities & PDC_MODEL_IOPDIR_FDC; | |
1879 | ||
1880 | #ifdef DEBUG_SBA_INIT | |
1881 | /* | |
1882 | * If the PDC_MODEL capabilities has Non-coherent IO-PDIR bit set | |
1883 | * (bit #61, big endian), we have to flush and sync every time | |
1884 | * IO-PDIR is changed in Ike/Astro. | |
1885 | */ | |
1886 | if (boot_cpu_data.pdc.capabilities & PDC_MODEL_IOPDIR_FDC) { | |
1887 | printk(KERN_INFO MODULE_NAME " FDC/SYNC required.\n"); | |
1888 | } else { | |
1889 | printk(KERN_INFO MODULE_NAME " IOC has cache coherent PDIR.\n"); | |
1890 | } | |
1891 | #endif | |
1892 | } | |
1893 | ||
1894 | #ifdef CONFIG_PROC_FS | |
7ec14e49 | 1895 | static int sba_proc_info(struct seq_file *m, void *p) |
1da177e4 LT |
1896 | { |
1897 | struct sba_device *sba_dev = sba_list; | |
1898 | struct ioc *ioc = &sba_dev->ioc[0]; /* FIXME: Multi-IOC support! */ | |
1899 | int total_pages = (int) (ioc->res_size << 3); /* 8 bits per byte */ | |
1da177e4 LT |
1900 | #ifdef SBA_COLLECT_STATS |
1901 | unsigned long avg = 0, min, max; | |
1902 | #endif | |
7ec14e49 | 1903 | int i, len = 0; |
1da177e4 | 1904 | |
7ec14e49 | 1905 | len += seq_printf(m, "%s rev %d.%d\n", |
1da177e4 LT |
1906 | sba_dev->name, |
1907 | (sba_dev->hw_rev & 0x7) + 1, | |
1908 | (sba_dev->hw_rev & 0x18) >> 3 | |
1909 | ); | |
7ec14e49 | 1910 | len += seq_printf(m, "IO PDIR size : %d bytes (%d entries)\n", |
1da177e4 LT |
1911 | (int) ((ioc->res_size << 3) * sizeof(u64)), /* 8 bits/byte */ |
1912 | total_pages); | |
1913 | ||
7ec14e49 KM |
1914 | len += seq_printf(m, "Resource bitmap : %d bytes (%d pages)\n", |
1915 | ioc->res_size, ioc->res_size << 3); /* 8 bits per byte */ | |
1da177e4 | 1916 | |
7ec14e49 | 1917 | len += seq_printf(m, "LMMIO_BASE/MASK/ROUTE %08x %08x %08x\n", |
1da177e4 LT |
1918 | READ_REG32(sba_dev->sba_hpa + LMMIO_DIST_BASE), |
1919 | READ_REG32(sba_dev->sba_hpa + LMMIO_DIST_MASK), | |
1920 | READ_REG32(sba_dev->sba_hpa + LMMIO_DIST_ROUTE) | |
1921 | ); | |
1922 | ||
1923 | for (i=0; i<4; i++) | |
7ec14e49 | 1924 | len += seq_printf(m, "DIR%d_BASE/MASK/ROUTE %08x %08x %08x\n", i, |
1da177e4 LT |
1925 | READ_REG32(sba_dev->sba_hpa + LMMIO_DIRECT0_BASE + i*0x18), |
1926 | READ_REG32(sba_dev->sba_hpa + LMMIO_DIRECT0_MASK + i*0x18), | |
1927 | READ_REG32(sba_dev->sba_hpa + LMMIO_DIRECT0_ROUTE + i*0x18) | |
1928 | ); | |
1929 | ||
1930 | #ifdef SBA_COLLECT_STATS | |
7ec14e49 | 1931 | len += seq_printf(m, "IO PDIR entries : %ld free %ld used (%d%%)\n", |
1da177e4 LT |
1932 | total_pages - ioc->used_pages, ioc->used_pages, |
1933 | (int) (ioc->used_pages * 100 / total_pages)); | |
1934 | ||
1935 | min = max = ioc->avg_search[0]; | |
1936 | for (i = 0; i < SBA_SEARCH_SAMPLE; i++) { | |
1937 | avg += ioc->avg_search[i]; | |
1938 | if (ioc->avg_search[i] > max) max = ioc->avg_search[i]; | |
1939 | if (ioc->avg_search[i] < min) min = ioc->avg_search[i]; | |
1940 | } | |
1941 | avg /= SBA_SEARCH_SAMPLE; | |
7ec14e49 KM |
1942 | len += seq_printf(m, " Bitmap search : %ld/%ld/%ld (min/avg/max CPU Cycles)\n", |
1943 | min, avg, max); | |
1da177e4 | 1944 | |
7ec14e49 KM |
1945 | len += seq_printf(m, "pci_map_single(): %12ld calls %12ld pages (avg %d/1000)\n", |
1946 | ioc->msingle_calls, ioc->msingle_pages, | |
1da177e4 LT |
1947 | (int) ((ioc->msingle_pages * 1000)/ioc->msingle_calls)); |
1948 | ||
1949 | /* KLUGE - unmap_sg calls unmap_single for each mapped page */ | |
1950 | min = ioc->usingle_calls; | |
1951 | max = ioc->usingle_pages - ioc->usg_pages; | |
7ec14e49 KM |
1952 | len += seq_printf(m, "pci_unmap_single: %12ld calls %12ld pages (avg %d/1000)\n", |
1953 | min, max, (int) ((max * 1000)/min)); | |
1da177e4 | 1954 | |
7ec14e49 KM |
1955 | len += seq_printf(m, "pci_map_sg() : %12ld calls %12ld pages (avg %d/1000)\n", |
1956 | ioc->msg_calls, ioc->msg_pages, | |
1da177e4 LT |
1957 | (int) ((ioc->msg_pages * 1000)/ioc->msg_calls)); |
1958 | ||
7ec14e49 KM |
1959 | len += seq_printf(m, "pci_unmap_sg() : %12ld calls %12ld pages (avg %d/1000)\n", |
1960 | ioc->usg_calls, ioc->usg_pages, | |
1da177e4 LT |
1961 | (int) ((ioc->usg_pages * 1000)/ioc->usg_calls)); |
1962 | #endif | |
1963 | ||
7ec14e49 | 1964 | return 0; |
1da177e4 LT |
1965 | } |
1966 | ||
1da177e4 | 1967 | static int |
7ec14e49 KM |
1968 | sba_proc_open(struct inode *i, struct file *f) |
1969 | { | |
1970 | return single_open(f, &sba_proc_info, NULL); | |
1971 | } | |
1972 | ||
1973 | static struct file_operations sba_proc_fops = { | |
1974 | .owner = THIS_MODULE, | |
1975 | .open = sba_proc_open, | |
1976 | .read = seq_read, | |
1977 | .llseek = seq_lseek, | |
1978 | .release = single_release, | |
1979 | }; | |
1980 | ||
1981 | static int | |
1982 | sba_proc_bitmap_info(struct seq_file *m, void *p) | |
1da177e4 LT |
1983 | { |
1984 | struct sba_device *sba_dev = sba_list; | |
7ec14e49 | 1985 | struct ioc *ioc = &sba_dev->ioc[0]; /* FIXME: Multi-IOC support! */ |
1da177e4 | 1986 | unsigned int *res_ptr = (unsigned int *)ioc->res_map; |
7ec14e49 | 1987 | int i, len = 0; |
1da177e4 | 1988 | |
7ec14e49 | 1989 | for (i = 0; i < (ioc->res_size/sizeof(unsigned int)); ++i, ++res_ptr) { |
1da177e4 | 1990 | if ((i & 7) == 0) |
7ec14e49 KM |
1991 | len += seq_printf(m, "\n "); |
1992 | len += seq_printf(m, " %08x", *res_ptr); | |
1da177e4 | 1993 | } |
7ec14e49 | 1994 | len += seq_printf(m, "\n"); |
1da177e4 | 1995 | |
7ec14e49 | 1996 | return 0; |
1da177e4 | 1997 | } |
7ec14e49 KM |
1998 | |
1999 | static int | |
2000 | sba_proc_bitmap_open(struct inode *i, struct file *f) | |
2001 | { | |
2002 | return single_open(f, &sba_proc_bitmap_info, NULL); | |
2003 | } | |
2004 | ||
2005 | static struct file_operations sba_proc_bitmap_fops = { | |
2006 | .owner = THIS_MODULE, | |
2007 | .open = sba_proc_bitmap_open, | |
2008 | .read = seq_read, | |
2009 | .llseek = seq_lseek, | |
2010 | .release = single_release, | |
2011 | }; | |
1da177e4 LT |
2012 | #endif /* CONFIG_PROC_FS */ |
2013 | ||
2014 | static struct parisc_device_id sba_tbl[] = { | |
2015 | { HPHW_IOA, HVERSION_REV_ANY_ID, ASTRO_RUNWAY_PORT, 0xb }, | |
2016 | { HPHW_BCPORT, HVERSION_REV_ANY_ID, IKE_MERCED_PORT, 0xc }, | |
2017 | { HPHW_BCPORT, HVERSION_REV_ANY_ID, REO_MERCED_PORT, 0xc }, | |
2018 | { HPHW_BCPORT, HVERSION_REV_ANY_ID, REOG_MERCED_PORT, 0xc }, | |
2019 | { HPHW_IOA, HVERSION_REV_ANY_ID, PLUTO_MCKINLEY_PORT, 0xc }, | |
2020 | { 0, } | |
2021 | }; | |
2022 | ||
2023 | int sba_driver_callback(struct parisc_device *); | |
2024 | ||
2025 | static struct parisc_driver sba_driver = { | |
2026 | .name = MODULE_NAME, | |
2027 | .id_table = sba_tbl, | |
2028 | .probe = sba_driver_callback, | |
2029 | }; | |
2030 | ||
2031 | /* | |
2032 | ** Determine if sba should claim this chip (return 0) or not (return 1). | |
2033 | ** If so, initialize the chip and tell other partners in crime they | |
2034 | ** have work to do. | |
2035 | */ | |
2036 | int | |
2037 | sba_driver_callback(struct parisc_device *dev) | |
2038 | { | |
2039 | struct sba_device *sba_dev; | |
2040 | u32 func_class; | |
2041 | int i; | |
2042 | char *version; | |
53f01bba | 2043 | void __iomem *sba_addr = ioremap(dev->hpa.start, SBA_FUNC_SIZE); |
7ec14e49 | 2044 | struct proc_dir_entry *info_entry, *bitmap_entry, *root; |
1da177e4 LT |
2045 | |
2046 | sba_dump_ranges(sba_addr); | |
2047 | ||
2048 | /* Read HW Rev First */ | |
2049 | func_class = READ_REG(sba_addr + SBA_FCLASS); | |
2050 | ||
2051 | if (IS_ASTRO(&dev->id)) { | |
2052 | unsigned long fclass; | |
2053 | static char astro_rev[]="Astro ?.?"; | |
2054 | ||
2055 | /* Astro is broken...Read HW Rev First */ | |
2056 | fclass = READ_REG(sba_addr); | |
2057 | ||
2058 | astro_rev[6] = '1' + (char) (fclass & 0x7); | |
2059 | astro_rev[8] = '0' + (char) ((fclass & 0x18) >> 3); | |
2060 | version = astro_rev; | |
2061 | ||
2062 | } else if (IS_IKE(&dev->id)) { | |
2063 | static char ike_rev[] = "Ike rev ?"; | |
2064 | ike_rev[8] = '0' + (char) (func_class & 0xff); | |
2065 | version = ike_rev; | |
2066 | } else if (IS_PLUTO(&dev->id)) { | |
2067 | static char pluto_rev[]="Pluto ?.?"; | |
2068 | pluto_rev[6] = '0' + (char) ((func_class & 0xf0) >> 4); | |
2069 | pluto_rev[8] = '0' + (char) (func_class & 0x0f); | |
2070 | version = pluto_rev; | |
2071 | } else { | |
2072 | static char reo_rev[] = "REO rev ?"; | |
2073 | reo_rev[8] = '0' + (char) (func_class & 0xff); | |
2074 | version = reo_rev; | |
2075 | } | |
2076 | ||
2077 | if (!global_ioc_cnt) { | |
2078 | global_ioc_cnt = count_parisc_driver(&sba_driver); | |
2079 | ||
2080 | /* Astro and Pluto have one IOC per SBA */ | |
2081 | if ((!IS_ASTRO(&dev->id)) || (!IS_PLUTO(&dev->id))) | |
2082 | global_ioc_cnt *= 2; | |
2083 | } | |
2084 | ||
2085 | printk(KERN_INFO "%s found %s at 0x%lx\n", | |
53f01bba | 2086 | MODULE_NAME, version, dev->hpa.start); |
1da177e4 | 2087 | |
cb6fc18e | 2088 | sba_dev = kzalloc(sizeof(struct sba_device), GFP_KERNEL); |
1da177e4 LT |
2089 | if (!sba_dev) { |
2090 | printk(KERN_ERR MODULE_NAME " - couldn't alloc sba_device\n"); | |
2091 | return -ENOMEM; | |
2092 | } | |
2093 | ||
2094 | parisc_set_drvdata(dev, sba_dev); | |
1da177e4 LT |
2095 | |
2096 | for(i=0; i<MAX_IOC; i++) | |
2097 | spin_lock_init(&(sba_dev->ioc[i].res_lock)); | |
2098 | ||
2099 | sba_dev->dev = dev; | |
2100 | sba_dev->hw_rev = func_class; | |
2101 | sba_dev->iodc = &dev->id; | |
2102 | sba_dev->name = dev->name; | |
2103 | sba_dev->sba_hpa = sba_addr; | |
2104 | ||
2105 | sba_get_pat_resources(sba_dev); | |
2106 | sba_hw_init(sba_dev); | |
2107 | sba_common_init(sba_dev); | |
2108 | ||
2109 | hppa_dma_ops = &sba_ops; | |
2110 | ||
2111 | #ifdef CONFIG_PROC_FS | |
7ec14e49 KM |
2112 | switch (dev->id.hversion) { |
2113 | case PLUTO_MCKINLEY_PORT: | |
2114 | root = proc_mckinley_root; | |
2115 | break; | |
2116 | case ASTRO_RUNWAY_PORT: | |
2117 | case IKE_MERCED_PORT: | |
2118 | default: | |
2119 | root = proc_runway_root; | |
2120 | break; | |
1da177e4 | 2121 | } |
7ec14e49 KM |
2122 | |
2123 | info_entry = create_proc_entry("sba_iommu", 0, root); | |
2124 | bitmap_entry = create_proc_entry("sba_iommu-bitmap", 0, root); | |
2125 | ||
2126 | if (info_entry) | |
2127 | info_entry->proc_fops = &sba_proc_fops; | |
2128 | ||
2129 | if (bitmap_entry) | |
2130 | bitmap_entry->proc_fops = &sba_proc_bitmap_fops; | |
1da177e4 | 2131 | #endif |
7ec14e49 | 2132 | |
1da177e4 LT |
2133 | parisc_vmerge_boundary = IOVP_SIZE; |
2134 | parisc_vmerge_max_size = IOVP_SIZE * BITS_PER_LONG; | |
2135 | parisc_has_iommu(); | |
2136 | return 0; | |
2137 | } | |
2138 | ||
2139 | /* | |
2140 | ** One time initialization to let the world know the SBA was found. | |
2141 | ** This is the only routine which is NOT static. | |
2142 | ** Must be called exactly once before pci_init(). | |
2143 | */ | |
2144 | void __init sba_init(void) | |
2145 | { | |
2146 | register_parisc_driver(&sba_driver); | |
2147 | } | |
2148 | ||
2149 | ||
2150 | /** | |
2151 | * sba_get_iommu - Assign the iommu pointer for the pci bus controller. | |
2152 | * @dev: The parisc device. | |
2153 | * | |
2154 | * Returns the appropriate IOMMU data for the given parisc PCI controller. | |
2155 | * This is cached and used later for PCI DMA Mapping. | |
2156 | */ | |
2157 | void * sba_get_iommu(struct parisc_device *pci_hba) | |
2158 | { | |
2159 | struct parisc_device *sba_dev = parisc_parent(pci_hba); | |
2160 | struct sba_device *sba = sba_dev->dev.driver_data; | |
2161 | char t = sba_dev->id.hw_type; | |
2162 | int iocnum = (pci_hba->hw_path >> 3); /* rope # */ | |
2163 | ||
2164 | WARN_ON((t != HPHW_IOA) && (t != HPHW_BCPORT)); | |
2165 | ||
2166 | return &(sba->ioc[iocnum]); | |
2167 | } | |
2168 | ||
2169 | ||
2170 | /** | |
2171 | * sba_directed_lmmio - return first directed LMMIO range routed to rope | |
2172 | * @pa_dev: The parisc device. | |
2173 | * @r: resource PCI host controller wants start/end fields assigned. | |
2174 | * | |
2175 | * For the given parisc PCI controller, determine if any direct ranges | |
2176 | * are routed down the corresponding rope. | |
2177 | */ | |
2178 | void sba_directed_lmmio(struct parisc_device *pci_hba, struct resource *r) | |
2179 | { | |
2180 | struct parisc_device *sba_dev = parisc_parent(pci_hba); | |
2181 | struct sba_device *sba = sba_dev->dev.driver_data; | |
2182 | char t = sba_dev->id.hw_type; | |
2183 | int i; | |
2184 | int rope = (pci_hba->hw_path & (ROPES_PER_IOC-1)); /* rope # */ | |
2185 | ||
b7494554 | 2186 | BUG_ON((t!=HPHW_IOA) && (t!=HPHW_BCPORT)); |
1da177e4 LT |
2187 | |
2188 | r->start = r->end = 0; | |
2189 | ||
2190 | /* Astro has 4 directed ranges. Not sure about Ike/Pluto/et al */ | |
2191 | for (i=0; i<4; i++) { | |
2192 | int base, size; | |
2193 | void __iomem *reg = sba->sba_hpa + i*0x18; | |
2194 | ||
2195 | base = READ_REG32(reg + LMMIO_DIRECT0_BASE); | |
2196 | if ((base & 1) == 0) | |
2197 | continue; /* not enabled */ | |
2198 | ||
2199 | size = READ_REG32(reg + LMMIO_DIRECT0_ROUTE); | |
2200 | ||
2201 | if ((size & (ROPES_PER_IOC-1)) != rope) | |
2202 | continue; /* directed down different rope */ | |
2203 | ||
2204 | r->start = (base & ~1UL) | PCI_F_EXTEND; | |
2205 | size = ~ READ_REG32(reg + LMMIO_DIRECT0_MASK); | |
2206 | r->end = r->start + size; | |
2207 | } | |
2208 | } | |
2209 | ||
2210 | ||
2211 | /** | |
2212 | * sba_distributed_lmmio - return portion of distributed LMMIO range | |
2213 | * @pa_dev: The parisc device. | |
2214 | * @r: resource PCI host controller wants start/end fields assigned. | |
2215 | * | |
2216 | * For the given parisc PCI controller, return portion of distributed LMMIO | |
2217 | * range. The distributed LMMIO is always present and it's just a question | |
2218 | * of the base address and size of the range. | |
2219 | */ | |
2220 | void sba_distributed_lmmio(struct parisc_device *pci_hba, struct resource *r ) | |
2221 | { | |
2222 | struct parisc_device *sba_dev = parisc_parent(pci_hba); | |
2223 | struct sba_device *sba = sba_dev->dev.driver_data; | |
2224 | char t = sba_dev->id.hw_type; | |
2225 | int base, size; | |
2226 | int rope = (pci_hba->hw_path & (ROPES_PER_IOC-1)); /* rope # */ | |
2227 | ||
b7494554 | 2228 | BUG_ON((t!=HPHW_IOA) && (t!=HPHW_BCPORT)); |
1da177e4 LT |
2229 | |
2230 | r->start = r->end = 0; | |
2231 | ||
2232 | base = READ_REG32(sba->sba_hpa + LMMIO_DIST_BASE); | |
2233 | if ((base & 1) == 0) { | |
2234 | BUG(); /* Gah! Distr Range wasn't enabled! */ | |
2235 | return; | |
2236 | } | |
2237 | ||
2238 | r->start = (base & ~1UL) | PCI_F_EXTEND; | |
2239 | ||
2240 | size = (~READ_REG32(sba->sba_hpa + LMMIO_DIST_MASK)) / ROPES_PER_IOC; | |
2241 | r->start += rope * (size + 1); /* adjust base for this rope */ | |
2242 | r->end = r->start + size; | |
2243 | } |